Merge "Unfreeze the surface when the transition is done" into tm-qpr-dev am: 5ebcaa2a60

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23053887

Change-Id: Iecf0da744e01665a0b998e16a0a90dffec835551
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

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

@@ -1416,6 +1416,9 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
     }
 
     void onAppTransitionDone() {
+        if (mSurfaceFreezer.hasLeash()) {
+            mSurfaceFreezer.unfreeze(getSyncTransaction());
+        }
         for (int i = mChildren.size() - 1; i >= 0; --i) {
             final WindowContainer wc = mChildren.get(i);
             wc.onAppTransitionDone();