Reset the force-invisible flag after the animation into launcher completes.

- In the case where an app auto-enters into PiP, we don't run the
  predefined remote animation, which means that the force-invisible flag
  is never reset. With ag/3876550, we can rely on enter animation complete
  to be called after the transition, and we can reset the flag here as well.

Bug: 77730018
Change-Id: Ifa4cbe518047eed7ab327721ff6d17db1a2b8cd5

src/com/android/launcher3/BaseActivity.java

@@ -142,6 +142,15 @@ public abstract class BaseActivity extends Activity {
         }
     }
 
+    @Override
+    public void onEnterAnimationComplete() {
+        super.onEnterAnimationComplete();
+
+        // Needed for activities that auto-enter PiP, which will not trigger a remote animation to
+        // be created
+        clearForceInvisibleFlag(INVISIBLE_BY_STATE_HANDLER);
+    }
+
     @Override
     protected void onStop() {
         mActivityFlags &= ~ACTIVITY_STATE_STARTED & ~ACTIVITY_STATE_USER_ACTIVE;