Reset recents translation when launching

So we don't end up with empty content after having cancelled
the drag in gesture.

Change-Id: If00c526806816df58c751cd715e0575dbb7adf17

packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java

@@ -411,6 +411,8 @@ public class RecentsView extends FrameLayout implements TaskStackView.TaskStackV
             RecentsActivityLaunchState launchState = Recents.getConfiguration().getLaunchState();
             if (launchState.launchedViaDragGesture) {
                 setTranslationY(getMeasuredHeight());
+            } else {
+                setTranslationY(0f);
             }
         }
     }