Fxing issues with the scroll bar

- Removing track from AllApps
- Scrollbar should reach edge of track now
- Fixing flashing when going from AppsCustomize to workspace and switching tabs in AppsCustomize

Change-Id: Id69bd04dc503608566c3a33a1344904e3db383bf

src/com/android/launcher2/AppsCustomizeTabHost.java

@@ -146,6 +146,10 @@ public class AppsCustomizeTabHost extends TabHost implements LauncherTransitiona
             ObjectAnimator anim = ObjectAnimator.ofFloat(mAppsCustomizePane, "alpha", 0f);
             anim.setDuration(duration);
             anim.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationStart(android.animation.Animator animation) {
+                    mAppsCustomizePane.hideScrollingIndicator(false);
+                }
                 @Override
                 public void onAnimationEnd(android.animation.Animator animation) {
                     mAppsCustomizePane.setContentType(type);