Forwarding touch events from floating header to recyclerview.

Additionally adds little sidepadding to the tabs buttons and fixes yPos
calculations for the scrollbar.

Bug: 69966700
Change-Id: I9d236ce7a782090f5d17931839f24b65b4ce7019
diff --git a/res/layout/all_apps.xml b/res/layout/all_apps.xml
index 6e91095..be509ed 100644
--- a/res/layout/all_apps.xml
+++ b/res/layout/all_apps.xml
@@ -48,12 +48,16 @@
             android:id="@+id/divider"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
+            android:layout_marginLeft="@dimen/all_apps_tabs_side_padding"
+            android:layout_marginRight="@dimen/all_apps_tabs_side_padding"
             android:layout_alignBottom="@+id/tabs" />
 
         <com.android.launcher3.views.SlidingTabStrip
             android:id="@+id/tabs"
             android:layout_width="match_parent"
             android:layout_height="@dimen/all_apps_header_tab_height"
+            android:layout_marginLeft="@dimen/all_apps_tabs_side_padding"
+            android:layout_marginRight="@dimen/all_apps_tabs_side_padding"
             android:layout_below="@id/header_content"
             android:orientation="horizontal" >
             <Button