Exit overscroll mode when the user interacts with the carousel.

This ensure that when the user releases the carousel, we don't
automatically revert to overscroll mode unless we're still in
the overscroll area.

Change-Id: I1cec3380452383e2ba70b1dfab540a53e8289838
diff --git a/carousel/java/com/android/ex/carousel/carousel.rs b/carousel/java/com/android/ex/carousel/carousel.rs
index 0b92c82..5991644 100644
--- a/carousel/java/com/android/ex/carousel/carousel.rs
+++ b/carousel/java/com/android/ex/carousel/carousel.rs
@@ -1001,6 +1001,7 @@
     touchTime = lastTime = eventTime;
     touchBias = bias;
     isDragging = true;
+    overscroll = false;
     animatedSelection = doSelection(x, y); // used to provide visual feedback on touch
 }