Prevent user from creating duplicate labels.

This isn't enforced at the data layer just in the UI's that
allow editting of the group name.

Bug 28718604
Change-Id: I969b0298bd895fdbdd7f8609da05f2b801707c0a
diff --git a/res/layout/floating_action_button.xml b/res/layout/floating_action_button.xml
index 95c76ae..2dc8955 100644
--- a/res/layout/floating_action_button.xml
+++ b/res/layout/floating_action_button.xml
@@ -14,24 +14,26 @@
      limitations under the License.
 -->
 
-<!-- This expects to be included inside a RelativeLayout -->
+<!-- This expects to be included inside a RelativeLayout or a CoordinatorLayout -->
 <FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/floating_action_button_container"
     android:layout_width="@dimen/floating_action_button_width"
     android:layout_height="@dimen/floating_action_button_height"
-    android:layout_marginEnd="@dimen/floating_action_button_margin_right"
-    android:layout_marginBottom="@dimen/floating_action_button_margin_bottom"
-    android:background="@drawable/fab_blue"
+    android:layout_alignParentBottom="true"
     android:layout_alignParentEnd="true"
-    android:layout_alignParentBottom="true">
+    android:layout_gravity="bottom|end"
+    android:layout_marginBottom="@dimen/floating_action_button_margin_bottom"
+    android:layout_marginEnd="@dimen/floating_action_button_margin_right"
+    android:background="@drawable/fab_blue"
+    android:elevation="@dimen/design_fab_elevation">
 
     <ImageButton
         android:id="@+id/floating_action_button"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="@drawable/floating_action_button"
-        android:tint="@color/floating_action_button_icon_color"
         android:contentDescription="@string/action_menu_add_new_contact_button"
-        android:src="@drawable/ic_add"/>
+        android:src="@drawable/ic_add"
+        android:tint="@color/floating_action_button_icon_color"/>
 </FrameLayout>
\ No newline at end of file