am 17c2336c: am ac457b1b: Merge "Fixed a crash in the Notification expandHelper" into lmp-mr1-dev automerge: 3804ebf

* commit '17c2336c94765516ac6e1591b4c8578e89c18c70':
  Fixed a crash in the Notification expandHelper

packages/SystemUI/src/com/android/systemui/ExpandHelper.java

@@ -351,6 +351,9 @@ public class ExpandHelper implements Gefingerpoken {
                 mVelocityTracker.addMovement(event);
                 break;
             case MotionEvent.ACTION_MOVE:
+                if (mVelocityTracker == null) {
+                    mVelocityTracker = VelocityTracker.obtain();
+                }
                 mVelocityTracker.addMovement(event);
                 break;
             default: