Merged PR 259833: Demo: UI Fabric version is shown in the subtitle of toolbar on the main screen

- Demo: now shows UI Fabric version in the subtitle of toolbar on the main screen

Related work items: #713614

OfficeUIFabric.Demo/src/main/java/com/microsoft/officeuifabricdemo/DemoListActivity.kt

@@ -39,6 +39,7 @@ class DemoListActivity : AppCompatActivity() {
 
         setSupportActionBar(toolbar)
         toolbar.title = title
+        toolbar.subtitle = com.microsoft.officeuifabric.BuildConfig.VERSION_NAME
 
         demo_list.adapter = DemoListAdapter()
         addDemoListDivider()

OfficeUIFabric.Demo/src/main/res/layout/activity_demo_list.xml

@@ -23,6 +23,7 @@
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
+            app:subtitleTextAppearance="@style/TextAppearance.Toolbar.Subtitle"
             app:popupTheme="@style/AppTheme.PopupOverlay" />
 
     </android.support.design.widget.AppBarLayout>

OfficeUIFabric.Demo/src/main/res/values/styles.xml

@@ -28,6 +28,9 @@
     </style>
 
     <!--Demo-->
+    <style name="TextAppearance.Toolbar.Subtitle" parent="TextAppearance.UIFabric.Caption">
+        <item name="android:textColor">@color/uifabric_white</item>
+    </style>
     <style name="TextAppearance.DemoListItem" parent="@style/TextAppearance.UIFabric.SubHeading">
         <item name="android:textColor">@color/uifabric_black</item>
     </style>