Adding a sliding tab strip to the custom tab layout.

Bug: 68713881

Change-Id: Ib0873482f80903611f183ccf430185f40a292f8e
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 94db0cc..2176c8d 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -91,6 +91,7 @@
     <dimen name="all_apps_background_canvas_height">475dp</dimen>
     <dimen name="all_apps_caret_workspace_offset">18dp</dimen>
     <dimen name="all_apps_header_tab_height">50dp</dimen>
+    <dimen name="all_apps_tabs_indicator_height">2dp</dimen>
 
 <!-- Search bar in All Apps -->
     <dimen name="all_apps_header_max_elevation">3dp</dimen>