Merge "Disable dragging on fullscreen tasks." into tm-qpr-dev am: 057f721740 am: 1f1d59d7ea

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19735064

Change-Id: Iffc5881df168b7dacb414e2f32dcc07247a0186a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecorViewModel.java

@@ -199,6 +199,10 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel<Caption
         }
 
         private void handleEventForMove(MotionEvent e) {
+            if (mTaskOrganizer.getRunningTaskInfo(mTaskId).getWindowingMode()
+                    == WINDOWING_MODE_FULLSCREEN) {
+                return;
+            }
             switch (e.getActionMasked()) {
                 case MotionEvent.ACTION_DOWN:
                     mDragPointerId  = e.getPointerId(0);