Send update config change when letterbox is moved

When letterbox is repositioned, window configuration bounds are changed.
Because we currently only report public config changes in
diffPublicOnly, the client doesn't report changes in window
configuration.

We should always report window configuration bounds change to notify
that the position of window has changed.

Bug: 262900133
Test: atest FrameworksCoreTests:android.app.activity.ActivityThreadTest
      Manual test with app in bug
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:70187af25ce3f56f85ddd703f982caa82f685605)
Merged-In: I9fc10876c03933ac8aac05205d56ad6537df72a8
Change-Id: I9fc10876c03933ac8aac05205d56ad6537df72a8

core/java/android/app/ActivityThread.java

@@ -36,6 +36,7 @@ import static android.view.Display.INVALID_DISPLAY;
 import static android.window.ConfigurationHelper.freeTextLayoutCachesIfNeeded;
 import static android.window.ConfigurationHelper.isDifferentDisplay;
 import static android.window.ConfigurationHelper.shouldUpdateResources;
+import static android.window.ConfigurationHelper.shouldUpdateWindowMetricsBounds;
 
 import static com.android.internal.annotations.VisibleForTesting.Visibility.PACKAGE;
 
@@ -5987,6 +5988,11 @@ public final class ActivityThread extends ClientTransactionHandler
     public static boolean shouldReportChange(@Nullable Configuration currentConfig,
             @NonNull Configuration newConfig, @Nullable SizeConfigurationBuckets sizeBuckets,
             int handledConfigChanges) {
+        // Always report changes in window configuration bounds
+        if (shouldUpdateWindowMetricsBounds(currentConfig, newConfig)) {
+            return true;
+        }
+
         final int publicDiff = currentConfig.diffPublicOnly(newConfig);
         // Don't report the change if there's no public diff between current and new config.
         if (publicDiff == 0) {

core/java/android/window/ConfigurationHelper.java

@@ -106,7 +106,7 @@ public class ConfigurationHelper {
      * @see WindowManager#getCurrentWindowMetrics()
      * @see WindowManager#getMaximumWindowMetrics()
      */
-    private static boolean shouldUpdateWindowMetricsBounds(@NonNull Configuration currentConfig,
+    public static boolean shouldUpdateWindowMetricsBounds(@NonNull Configuration currentConfig,
             @NonNull Configuration newConfig) {
         final Rect currentBounds = currentConfig.windowConfiguration.getBounds();
         final Rect newBounds = newConfig.windowConfiguration.getBounds();

core/tests/coretests/src/android/app/activity/ActivityThreadTest.java

@@ -351,10 +351,8 @@ public class ActivityThreadTest {
         final Rect bounds = activity.getWindowManager().getCurrentWindowMetrics().getBounds();
         assertEquals(activityConfigPortrait.windowConfiguration.getBounds(), bounds);
 
-        // Ensure that Activity#onConfigurationChanged() not be called because the changes in
+        // Ensure changes in window configuration bounds are reported
-        // WindowConfiguration shouldn't be reported, and we only apply the latest Configuration
+        assertEquals(numOfConfig + 1, activity.mNumOfConfigChanges);
-        // update in transaction.
-        assertEquals(numOfConfig, activity.mNumOfConfigChanges);
     }
 
     @Test