More TabWidget and padding tweaks to match spec.

Also fix NPE in UserDictionarySettings.

Bug: 5184822
Change-Id: I082981c3bcf9b1e6575dcf9f42495a17f0ec8672
diff --git a/res/layout/data_usage_header.xml b/res/layout/data_usage_header.xml
index ba41c88..b27d88f 100644
--- a/res/layout/data_usage_header.xml
+++ b/res/layout/data_usage_header.xml
@@ -17,7 +17,9 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:clipChildren="false"
+    android:clipToPadding="false">
 
     <FrameLayout
         android:id="@+id/network_switches_container"