Merge "Defer updating dim layers if layout is deferred" into oc-dr1-dev

am: 9aa43e6320

Change-Id: I0889a00cbdc54d401484391d66e0dd06ac92fd71

services/core/java/com/android/server/wm/WindowState.java

@@ -2042,6 +2042,11 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
         if (dc == null) {
             return;
         }
+
+        // If layout is currently deferred, we want to hold of with updating the layers.
+        if (mService.mWindowPlacerLocked.isLayoutDeferred()) {
+            return;
+        }
         final DimLayer.DimLayerUser dimLayerUser = getDimLayerUser();
         if (dimLayerUser != null && dc.mDimLayerController.isDimming(dimLayerUser, mWinAnimator)) {
             // Force an animation pass just to update the mDimLayer layer.

services/core/java/com/android/server/wm/WindowSurfacePlacer.java

@@ -127,6 +127,10 @@ class WindowSurfacePlacer {
         }
     }
 
+    boolean isLayoutDeferred() {
+        return mDeferDepth > 0;
+    }
+
     final void performSurfacePlacement() {
         performSurfacePlacement(false /* force */);
     }