Add empty view for empty groups

Bug 28982874

Change-Id: I757651e3fd2897d65609ab233722160e0b267b01
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 4332a6b..04252238 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -398,4 +398,21 @@
     <style name="NavigationDrawerMenuItemTextAppearance">
         <item name="android:ellipsize">end</item>
     </style>
+
+    <!-- Text style for empty states. -->
+    <style name="EmptyStateTextStyle">
+        <item name="android:textSize">18sp</item>
+        <item name="android:textColor">#000000</item>
+        <item name="android:alpha">0.54</item>
+        <item name="android:fontFamily">sans-serif</item>
+    </style>
+
+    <!-- Add contacts button style for empty states. -->
+    <style name="AddContactsButtonStyle" parent="android:Widget.Holo.Button.Borderless">
+        <item name="android:textSize">16sp</item>
+        <item name="android:textColor">#0288d1</item>
+        <item name="android:fontFamily">sans-serif-medium</item>
+        <item name="android:textAllCaps">true</item>
+        <item name="android:minHeight">0dp</item>
+    </style>
 </resources>