ViewRootImpl: Use mergeWithNextTransaction for updating bounds layer

Continuing the general trend of deprecating deferTransactionUntil.

Bug: 168505645
Test: Existing tests pass
Change-Id: I72e1f4e2eec369ecdbd3723d9af3f9f2e8f71c36

core/java/android/view/ViewRootImpl.java

@@ -1912,25 +1912,18 @@ public final class ViewRootImpl implements ViewParent,
     private boolean updateBoundsLayer(SurfaceControl.Transaction t) {
         if (mBoundsLayer != null) {
             setBoundsLayerCrop(t);
-            t.deferTransactionUntil(mBoundsLayer, getSurfaceControl(),
-                mSurface.getNextFrameNumber());
             return true;
         }
         return false;
     }
 
-    private void prepareSurfaces(boolean sizeChanged) {
+    private void prepareSurfaces() {
         final SurfaceControl.Transaction t = mTransaction;
         final SurfaceControl sc = getSurfaceControl();
         if (!sc.isValid()) return;
 
-        boolean applyTransaction = updateBoundsLayer(t);
-        if (sizeChanged) {
-            applyTransaction = true;
-            t.setBufferSize(sc, mSurfaceSize.x, mSurfaceSize.y);
-        }
-        if (applyTransaction) {
-            t.apply();
+        if (updateBoundsLayer(t)) {
+              mergeWithNextTransaction(t, mSurface.getNextFrameNumber());
         }
     }
 
@@ -3035,7 +3028,7 @@ public final class ViewRootImpl implements ViewParent,
             // stopping, but on the client side it doesn't get stopped since it's restarted quick
             // enough. WMS doesn't want to keep around old children since they will leak when the
             // client creates new children.
-            prepareSurfaces(surfaceSizeChanged);
+            prepareSurfaces();
         }
 
         final boolean didLayout = layoutRequested && (!mStopped || mReportNextDraw);