Merge "apply empty transaction in startActivitySync" into qt-dev am:...

import android.view.KeyCharacterMap;

import android.view.KeyEvent;

import android.view.MotionEvent;

import android.view.SurfaceControl;

import android.view.ViewConfiguration;

import android.view.Window;

import android.view.WindowManagerGlobal;

            } while (mWaitingActivities.contains(aw));

            waitForEnterAnimationComplete(aw.activity);

            // Apply an empty transaction to ensure SF has a chance to update before

            // the Activity is ready (b/138263890).

            try (SurfaceControl.Transaction t = new SurfaceControl.Transaction()) {

                t.apply(true);

            }

            return aw.activity;

        }

    }