Immediate 2nd quickscrub should not cancel if same state

Trigging quickscrub immediately after a previous quickscrub would cause
the controller to cancel even if the state change was from overview to
overview, then controller will not do auto-advancing because it thinks
quickscrub has been cancelled. If the state changes but both are
overview then do not cancel and quickscrub can do auto-advancing.

Change-Id: I309937572ad23eea14662501f41c13cd79dd10ab
Fixes: 110006796
Test: quickscrub, then let go and soon after quickscrub again
diff --git a/src/com/android/launcher3/LauncherStateManager.java b/src/com/android/launcher3/LauncherStateManager.java
index 8b415d6..3c7c1aa 100644
--- a/src/com/android/launcher3/LauncherStateManager.java
+++ b/src/com/android/launcher3/LauncherStateManager.java
@@ -382,7 +382,9 @@
     }
 
     private void onStateTransitionStart(LauncherState state) {
-        mState.onStateDisabled(mLauncher);
+        if (mState != state) {
+            mState.onStateDisabled(mLauncher);
+        }
         mState = state;
         mState.onStateEnabled(mLauncher);
         mLauncher.getAppWidgetHost().setResumed(state == LauncherState.NORMAL);