Turn on hardware acceleration flag on the windowless window we render

Bug: 150224413
Test: Manual. Make sure universal smartspace still works as intended.
Change-Id: I9ed867ca1612b5c016e97765ebf077051c5da23c

packages/SystemUI/shared/src/com/android/systemui/shared/system/SurfaceViewRequestReceiver.java

@@ -62,7 +62,7 @@ public class SurfaceViewRequestReceiver {
                             surfaceControl.getWidth(),
                             surfaceControl.getHeight(),
                             WindowManager.LayoutParams.TYPE_APPLICATION,
-                            0,
+                            WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
                             mOpacity);
 
             mSurfaceControlViewHost.addView(view, layoutParams);