Optimizations to reduce all apps jank.

* Since adding springs to the apps in All Apps, it is no longer
  efficient to build a hardware layer for it.
* Pre-uploads bitmaps to RenderThread.
* Only add overview animations if we are transitioning to/from it.

Bug: 63711551
Change-Id: I948267598e95ec59dc156acb9abe6b5b789110c0

src/com/android/launcher3/BubbleTextView.java

@@ -592,6 +592,9 @@ public class BubbleTextView extends TextView implements ItemInfoUpdateReceiver {
             mIconLoadRequest = null;
             mDisableRelayout = true;
 
+            // Optimization: Starting in N, pre-uploads the bitmap to RenderThread.
+            info.iconBitmap.prepareToDraw();
+
             if (info instanceof AppInfo) {
                 applyFromApplicationInfo((AppInfo) info);
             } else if (info instanceof ShortcutInfo) {