Merge "Wait for attachment in Activity syncEngine"

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

@@ -9402,6 +9402,10 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
     boolean isSyncFinished() {
         if (!super.isSyncFinished()) return false;
         if (!isVisibleRequested()) return true;
+        // Wait for attach. That is the earliest time where we know if there will be an associated
+        // display rotation. If we don't wait, the starting-window can finishDrawing first and
+        // cause the display rotation to end-up in a following transition.
+        if (!isAttached()) return false;
         // If visibleRequested, wait for at-least one visible child.
         for (int i = mChildren.size() - 1; i >= 0; --i) {
             if (mChildren.get(i).isVisibleRequested()) {