Unhide LinkProperties, NetworkCapabilities, NetworkRequest APIs

These methods are marked to @UnsupportedAppUsage APIs since
Android Q. But some system apps still need them to set/get
necessary network or request information. Hence, make them to be
public or system APIs.

Bug: 120448492
Test: atest FrameworksNetTests
Change-Id: I95a44daef5615e290b40d0796ca183b88ad8a63f

core/java/android/net/LinkProperties.java

@@ -18,6 +18,7 @@ package android.net;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.SystemApi;
 import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -161,7 +162,7 @@ public final class LinkProperties implements Parcelable {
     /**
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public LinkProperties() {
     }
 
@@ -195,7 +196,7 @@ public final class LinkProperties implements Parcelable {
      * @param iface The name of the network interface used for this link.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public void setInterfaceName(String iface) {
         mIfaceName = iface;
         ArrayList<RouteInfo> newRoutes = new ArrayList<>(mRoutes.size());
@@ -346,7 +347,7 @@ public final class LinkProperties implements Parcelable {
      *                  object.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public void setLinkAddresses(Collection<LinkAddress> addresses) {
         mLinkAddresses.clear();
         for (LinkAddress address: addresses) {
@@ -392,7 +393,7 @@ public final class LinkProperties implements Parcelable {
      * @param dnsServers The {@link Collection} of DNS servers to set in this object.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public void setDnsServers(Collection<InetAddress> dnsServers) {
         mDnses.clear();
         for (InetAddress dnsServer: dnsServers) {
@@ -529,7 +530,7 @@ public final class LinkProperties implements Parcelable {
      *                domains to search when resolving host names on this link.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public void setDomains(String domains) {
         mDomains = domains;
     }
@@ -552,7 +553,7 @@ public final class LinkProperties implements Parcelable {
      * @param mtu The MTU to use for this link.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public void setMtu(int mtu) {
         mMtu = mtu;
     }
@@ -562,9 +563,7 @@ public final class LinkProperties implements Parcelable {
      * this will return 0.
      *
      * @return The mtu value set for this link.
-     * @hide
      */
-    @UnsupportedAppUsage
     public int getMtu() {
         return mMtu;
     }
@@ -613,7 +612,7 @@ public final class LinkProperties implements Parcelable {
      *
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public boolean addRoute(RouteInfo route) {
         if (route != null) {
             String routeIface = route.getInterface();
@@ -688,7 +687,7 @@ public final class LinkProperties implements Parcelable {
      * @param proxy A {@link ProxyInfo} defining the HTTP Proxy to use on this link.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public void setHttpProxy(ProxyInfo proxy) {
         mHttpProxy = proxy;
     }
@@ -760,7 +759,7 @@ public final class LinkProperties implements Parcelable {
      * Clears this object to its initial state.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public void clear() {
         mIfaceName = null;
         mLinkAddresses.clear();

core/java/android/net/NetworkCapabilities.java

@@ -976,7 +976,7 @@ public final class NetworkCapabilities implements Parcelable {
      * @return The bearer-specific signal strength.
      * @hide
      */
-    @UnsupportedAppUsage
+    @SystemApi
     public int getSignalStrength() {
         return mSignalStrength;
     }

core/java/android/net/NetworkRequest.java

@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.NonNull;
+import android.annotation.SystemApi;
 import android.annotation.UnsupportedAppUsage;
 import android.net.NetworkCapabilities.NetCapability;
 import android.net.NetworkCapabilities.Transport;
@@ -344,7 +345,7 @@ public class NetworkRequest implements Parcelable {
          * @param signalStrength the bearer-specific signal strength.
          * @hide
          */
-        @UnsupportedAppUsage
+        @SystemApi
         public Builder setSignalStrength(int signalStrength) {
             mNetworkCapabilities.setSignalStrength(signalStrength);
             return this;