Cleaning up overscroll effect in launcher workspace

-> Making sure workspace is drawn above the hotseat and qsb
-> Dimming the dock divider and page indicator during overscroll

Change-Id: I40766aa88e58db2d102c11d1ae8b2455aa459a07

src/com/android/launcher2/PagedView.java

@@ -1703,7 +1703,7 @@ public abstract class PagedView extends ViewGroup {
         }
     }
 
-    private ImageView getScrollingIndicator() {
+    protected ImageView getScrollingIndicator() {
         // We use mHasScrollIndicator to prevent future lookups if there is no sibling indicator
         // found
         if (mHasScrollIndicator && mScrollIndicator == null) {
@@ -1742,9 +1742,7 @@ public abstract class PagedView extends ViewGroup {
             // Fade the indicator in
             updateScrollingIndicatorPosition();
             mScrollIndicator.setVisibility(View.VISIBLE);
-            if (mScrollIndicatorAnimator != null) {
-                mScrollIndicatorAnimator.cancel();
-            }
+            cancelScrollingIndicatorAnimations();
             if (immediately) {
                 mScrollIndicator.setAlpha(1f);
             } else {
@@ -1755,6 +1753,12 @@ public abstract class PagedView extends ViewGroup {
         }
     }
 
+    protected void cancelScrollingIndicatorAnimations() {
+        if (mScrollIndicatorAnimator != null) {
+            mScrollIndicatorAnimator.cancel();
+        }
+    }
+
     protected void hideScrollingIndicator(boolean immediately) {
         if (getChildCount() <= 1) return;
         if (!isScrollingIndicatorEnabled()) return;
@@ -1763,9 +1767,7 @@ public abstract class PagedView extends ViewGroup {
         if (mScrollIndicator != null) {
             // Fade the indicator out
             updateScrollingIndicatorPosition();
-            if (mScrollIndicatorAnimator != null) {
-                mScrollIndicatorAnimator.cancel();
-            }
+            cancelScrollingIndicatorAnimations();
             if (immediately) {
                 mScrollIndicator.setVisibility(View.GONE);
                 mScrollIndicator.setAlpha(0f);