[TNU09] Adjust restricted notification

1. Let restricted notification that can be dismissed.
2. Only put up restricted notification when any of tethering is
   activating.

Bug: 154214549
Test: atest TetheringTests
Change-Id: Ib980aca154036828abdab35e3bb11d42f85ff610
Merged-In: Ib980aca154036828abdab35e3bb11d42f85ff610
(cherry picked from commit 2eb66bdbe4, aosp/1290334)

Tethering/src/com/android/networkstack/tethering/Tethering.java

@@ -1006,6 +1006,11 @@ public class Tethering {
         }
     }
 
+    @VisibleForTesting
+    boolean isTetheringActive() {
+        return mActiveTetheringRequests.size() > 0;
+    }
+
     @VisibleForTesting
     protected static class UserRestrictionActionListener {
         private final UserManager mUserManager;
@@ -1043,13 +1048,14 @@ public class Tethering {
                 return;
             }
 
+            if (mWrapper.isTetheringActive()) {
                 // Restricted notification is shown when tethering function is disallowed on
                 // user's device.
                 mNotificationUpdater.notifyTetheringDisabledByRestriction();
 
                 // Untether from all downstreams since tethering is disallowed.
                 mWrapper.untetherAll();
-
+            }
             // TODO(b/148139325): send tetheringSupported on restriction change
         }
     }

Tethering/src/com/android/networkstack/tethering/TetheringNotificationUpdater.java

@@ -267,7 +267,7 @@ public class TetheringNotificationUpdater {
                 null /* options */);
 
         showNotification(R.drawable.stat_sys_tether_general, title, message,
-                RESTRICTED_NOTIFICATION_ID, pi, new Action[0]);
+                RESTRICTED_NOTIFICATION_ID, false /* ongoing */, pi, new Action[0]);
     }
 
     private void notifyTetheringNoUpstream() {
@@ -288,7 +288,7 @@ public class TetheringNotificationUpdater {
         final Action action = new Action.Builder(NO_ICON_ID, disableButton, pi).build();
 
         showNotification(R.drawable.stat_sys_tether_general, title, message,
-                NO_UPSTREAM_NOTIFICATION_ID, null /* pendingIntent */, action);
+                NO_UPSTREAM_NOTIFICATION_ID, true /* ongoing */, null /* pendingIntent */, action);
     }
 
     private boolean setupRoamingNotification() {
@@ -310,7 +310,7 @@ public class TetheringNotificationUpdater {
                 null /* options */);
 
         showNotification(R.drawable.stat_sys_tether_general, title, message,
-                ROAMING_NOTIFICATION_ID, pi, new Action[0]);
+                ROAMING_NOTIFICATION_ID, true /* ongoing */, pi, new Action[0]);
         return NOTIFY_DONE;
     }
 
@@ -327,14 +327,14 @@ public class TetheringNotificationUpdater {
     }
 
     private void showNotification(@DrawableRes final int iconId, @NonNull final String title,
-            @NonNull final String message, @NotificationId final int id, @Nullable PendingIntent pi,
+            @NonNull final String message, @NotificationId final int id, final boolean ongoing,
-            @NonNull final Action... actions) {
+            @Nullable PendingIntent pi, @NonNull final Action... actions) {
         final Notification notification =
                 new Notification.Builder(mContext, mChannel.getId())
                         .setSmallIcon(iconId)
                         .setContentTitle(title)
                         .setContentText(message)
-                        .setOngoing(true)
+                        .setOngoing(ongoing)
                         .setColor(mContext.getColor(
                                 android.R.color.system_notification_accent_color))
                         .setVisibility(Notification.VISIBILITY_PUBLIC)

Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java

@@ -1079,12 +1079,12 @@ public class TetheringTest {
     }
 
     private void runUserRestrictionsChange(
-            boolean currentDisallow, boolean nextDisallow, String[] activeTetheringIfacesList,
+            boolean currentDisallow, boolean nextDisallow, boolean isTetheringActive,
             int expectedInteractionsWithShowNotification) throws  Exception {
         final Bundle newRestrictions = new Bundle();
         newRestrictions.putBoolean(UserManager.DISALLOW_CONFIG_TETHERING, nextDisallow);
         final Tethering mockTethering = mock(Tethering.class);
-        when(mockTethering.getTetheredIfaces()).thenReturn(activeTetheringIfacesList);
+        when(mockTethering.isTetheringActive()).thenReturn(isTetheringActive);
         when(mUserManager.getUserRestrictions()).thenReturn(newRestrictions);
 
         final Tethering.UserRestrictionActionListener ural =
@@ -1100,63 +1100,63 @@ public class TetheringTest {
     }
 
     @Test
-    public void testDisallowTetheringWhenNoTetheringInterfaceIsActive() throws Exception {
+    public void testDisallowTetheringWhenTetheringIsNotActive() throws Exception {
-        final String[] emptyActiveIfacesList = new String[]{};
+        final boolean isTetheringActive = false;
+        final boolean currDisallow = false;
+        final boolean nextDisallow = true;
+        final int expectedInteractionsWithShowNotification = 0;
+
+        runUserRestrictionsChange(currDisallow, nextDisallow, isTetheringActive,
+                expectedInteractionsWithShowNotification);
+    }
+
+    @Test
+    public void testDisallowTetheringWhenTetheringIsActive() throws Exception {
+        final boolean isTetheringActive = true;
         final boolean currDisallow = false;
         final boolean nextDisallow = true;
         final int expectedInteractionsWithShowNotification = 1;
 
-        runUserRestrictionsChange(currDisallow, nextDisallow, emptyActiveIfacesList,
+        runUserRestrictionsChange(currDisallow, nextDisallow, isTetheringActive,
                 expectedInteractionsWithShowNotification);
     }
 
     @Test
-    public void testDisallowTetheringWhenAtLeastOneTetheringInterfaceIsActive() throws Exception {
+    public void testAllowTetheringWhenTetheringIsNotActive() throws Exception {
-        final String[] nonEmptyActiveIfacesList = new String[]{TEST_WLAN_IFNAME};
+        final boolean isTetheringActive = false;
-        final boolean currDisallow = false;
-        final boolean nextDisallow = true;
-        final int expectedInteractionsWithShowNotification = 1;
-
-        runUserRestrictionsChange(currDisallow, nextDisallow, nonEmptyActiveIfacesList,
-                expectedInteractionsWithShowNotification);
-    }
-
-    @Test
-    public void testAllowTetheringWhenNoTetheringInterfaceIsActive() throws Exception {
-        final String[] nonEmptyActiveIfacesList = new String[]{};
         final boolean currDisallow = true;
         final boolean nextDisallow = false;
         final int expectedInteractionsWithShowNotification = 0;
 
-        runUserRestrictionsChange(currDisallow, nextDisallow, nonEmptyActiveIfacesList,
+        runUserRestrictionsChange(currDisallow, nextDisallow, isTetheringActive,
                 expectedInteractionsWithShowNotification);
     }
 
     @Test
-    public void testAllowTetheringWhenAtLeastOneTetheringInterfaceIsActive() throws Exception {
+    public void testAllowTetheringWhenTetheringIsActive() throws Exception {
-        final String[] nonEmptyActiveIfacesList = new String[]{TEST_WLAN_IFNAME};
+        final boolean isTetheringActive = true;
         final boolean currDisallow = true;
         final boolean nextDisallow = false;
         final int expectedInteractionsWithShowNotification = 0;
 
-        runUserRestrictionsChange(currDisallow, nextDisallow, nonEmptyActiveIfacesList,
+        runUserRestrictionsChange(currDisallow, nextDisallow, isTetheringActive,
                 expectedInteractionsWithShowNotification);
     }
 
     @Test
     public void testDisallowTetheringUnchanged() throws Exception {
-        final String[] nonEmptyActiveIfacesList = new String[]{TEST_WLAN_IFNAME};
+        final boolean isTetheringActive = true;
         final int expectedInteractionsWithShowNotification = 0;
         boolean currDisallow = true;
         boolean nextDisallow = true;
 
-        runUserRestrictionsChange(currDisallow, nextDisallow, nonEmptyActiveIfacesList,
+        runUserRestrictionsChange(currDisallow, nextDisallow, isTetheringActive,
                 expectedInteractionsWithShowNotification);
 
         currDisallow = false;
         nextDisallow = false;
 
-        runUserRestrictionsChange(currDisallow, nextDisallow, nonEmptyActiveIfacesList,
+        runUserRestrictionsChange(currDisallow, nextDisallow, isTetheringActive,
                 expectedInteractionsWithShowNotification);
     }