Enable to listen to WindowContext's config changes

This CL overrides registerComponentCallbacks for
WindowContext. Users can use below code snippet
to listen to Configuration changes.
```
Context windowContext = context.createWindowContext(
        display, ...);
windowContext.registerComponentCallbacks(
        new ComponentCallbacks() {
            @Override
            public void onConfigurationChanged(
                    Configuration newConfig) {
                    // Do Something
                }
        });
```

Bug: 181134729
Test: atest WindowContextTests
Test: atest ComponentCallbacksControllerTest

Change-Id: Iff46607bae3c942a96b64dcc97708f3a8c33f23a

1 files changed, 3 insertions, 1 deletions

diff --git a/core/java/android/app/WindowTokenClient.java b/core/java/android/app/WindowTokenClient.java
index 2298e84d755e..82cef072ad0f 100644
--- a/core/java/android/app/WindowTokenClient.java
+++ b/core/java/android/app/WindowTokenClient.java
@@ -61,7 +61,7 @@ public class WindowTokenClient extends IWindowToken.Stub {
 
     @Override
     public void onConfigurationChanged(Configuration newConfig, int newDisplayId) {
-        final Context context = mContextRef.get();
+        final WindowContext context = mContextRef.get();
         if (context == null) {
             return;
         }
@@ -72,6 +72,8 @@ public class WindowTokenClient extends IWindowToken.Stub {
         if (displayChanged || configChanged) {
             // TODO(ag/9789103): update resource manager logic to track non-activity tokens
             mResourcesManager.updateResourcesForActivity(this, newConfig, newDisplayId);
+            ActivityThread.currentActivityThread().getHandler().post(
+                    () -> context.dispatchConfigurationChanged(newConfig));
         }
         if (displayChanged) {
             context.updateDisplay(newDisplayId);