Disable ignoring validation on roam just after boot.

shouldIgnoreValidationFailureAfterRoam will incorrectly return
true in the first few seconds after boot even if the network
never roamed. This is extremely unlikely to happen, but add a
check for that just in case.

Fix: 230450214
Test: new unit test
Change-Id: I0789d9bdaa0bd9e78673e8f4248a2ca610052f1e

tests/unit/java/com/android/server/ConnectivityServiceTest.java

@@ -16861,6 +16861,35 @@ public class ConnectivityServiceTest {
         doTestIgnoreValidationAfterRoam(5_000, enabled);
     }
 
+    @Test
+    public void testShouldIgnoreValidationFailureAfterRoam() {
+        // Always disabled on T+.
+        assumeFalse(SdkLevel.isAtLeastT());
+
+        NetworkAgentInfo nai = fakeWifiNai(new NetworkCapabilities());
+
+        // Enabled, but never roamed.
+        doReturn(5_000).when(mResources)
+                .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
+        assertEquals(0, nai.lastRoamTime);
+        assertFalse(mService.shouldIgnoreValidationFailureAfterRoam(nai));
+
+        // Roamed recently.
+        nai.lastRoamTime = SystemClock.elapsedRealtime() - 500 /* ms */;
+        assertTrue(mService.shouldIgnoreValidationFailureAfterRoam(nai));
+
+        // Disabled due to invalid setting (maximum is 10 seconds).
+        doReturn(15_000).when(mResources)
+                .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
+        assertFalse(mService.shouldIgnoreValidationFailureAfterRoam(nai));
+
+        // Disabled.
+        doReturn(-1).when(mResources)
+                .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
+        assertFalse(mService.shouldIgnoreValidationFailureAfterRoam(nai));
+    }
+
+
     @Test
     public void testLegacyTetheringApiGuardWithProperPermission() throws Exception {
         final String testIface = "test0";