Merge "Check null for top activity when updating orientation" into tm-qpr-dev

            }

            // The orientation source may not be the top if it uses SCREEN_ORIENTATION_BEHIND.

            final ActivityRecord topCandidate = !r.isVisibleRequested() ? topRunningActivity() : r;

            if (handleTopActivityLaunchingInDifferentOrientation(

            if (topCandidate != null && handleTopActivityLaunchingInDifferentOrientation(

                    topCandidate, r, true /* checkOpening */)) {

                // Display orientation should be deferred until the top fixed rotation is finished.

                return false;