Merge "Prevent double touch inputs in the BaseDragLayer" into tm-qpr-dev am: 73049b14b9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20040579

Change-Id: Id45956331342c37e1d5f81d355c07c82837fc9d6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

src/com/android/launcher3/views/BaseDragLayer.java

@@ -273,6 +273,12 @@ public abstract class BaseDragLayer<T extends Context & ActivityContext>
 
     @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
+        if (ev.getActionIndex() > 0) {
+            // This means there is multiple touch inputs, ignore it, we could also cancel the
+            // previous touch but the user might cancel the drag by accident.
+            return true;
+        }
+
         switch (ev.getAction()) {
             case ACTION_DOWN: {
                 if ((mTouchDispatchState & TOUCH_DISPATCHING_TO_VIEW_IN_PROGRESS) != 0) {