Ignore onPostListReady call if the activity has been destroyed

ResolverActivity#onPostListReady is called asynchronously on the main
thread and it is possible for it to be executed after activity’s
onDestroy call.
A check for activity’s status is added to the method.

Test: atest FrameworksCoreTests:ChooserActivityTest
Fix: 254787909
Change-Id: I96d98a03d86881845868a67e33ea8ee7c9dc6631

core/java/com/android/internal/app/ResolverActivity.java

@@ -1098,6 +1098,9 @@ public class ResolverActivity extends Activity implements
     @Override // ResolverListCommunicator
     public final void onPostListReady(ResolverListAdapter listAdapter, boolean doPostProcessing,
             boolean rebuildCompleted) {
+        if (isDestroyed()) {
+            return;
+        }
         if (isAutolaunching()) {
             return;
         }