Updating the all-apps discovery bounce animation

> Animation plays on every onResume
> Updating animation to loop continuously on v23+
> Updating animation spec

Bug: 64331951
Change-Id: Ic6fb8d6975b37f5b010fc585329cba615296f5c7

src/com/android/launcher3/LauncherCallbacks.java

@@ -95,6 +95,4 @@ public interface LauncherCallbacks {
     int SEARCH_BAR_HEIGHT_NORMAL = 0, SEARCH_BAR_HEIGHT_TALL = 1;
     /** Must return one of {@link #SEARCH_BAR_HEIGHT_NORMAL} or {@link #SEARCH_BAR_HEIGHT_TALL} */
     int getSearchBarHeight();
-
-    boolean shouldShowDiscoveryBounce();
 }