More PagedView cleanup

-> Custom content screen is now full screen (with some padding inserted for now)
-> Hiding the hotseat and page indicators when scrolling to the
   custom content screen
-> Adding background scrim fade in to custom content space.

Change-Id: I28921318a38af46f11fa836020a590c70d5d96ed
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 561bd16..bf9773a 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -839,6 +839,11 @@
         mWorkspace.addCustomContentToLeft(customContent);
     }
 
+    // The custom content needs to offset its content to account for the QSB
+    public int getTopOffsetForCustomContent() {
+        return mWorkspace.getPaddingTop();
+    }
+
     @Override
     public Object onRetainNonConfigurationInstance() {
         // Flag the loader to stop early before switching