Update browseable samples for lmp-docs

Synced to commit df5e5013422b81b4fd05c0ac9fd964b13624847a. Includes
new samples for Android Auto.

Change-Id: I3fec46e2a6b3f196682a92f1afd91eb682dc2dc1

samples/browseable/BasicMediaRouter/AndroidManifest.xml

@@ -20,9 +20,7 @@
     android:versionCode="1"
     android:versionName="1.0" >
 
-    <uses-sdk
-        android:minSdkVersion="17"
-        android:targetSdkVersion="17" />
+    <!-- Min/target SDK versions (<uses-sdk>) managed by build.gradle -->
 
     <application
         android:allowBackup="true"

samples/browseable/BasicMediaRouter/_index.jd

@@ -1,18 +1,14 @@
-
-
-
 page.tags="BasicMediaRouter"
 sample.group=Media
 @jd:body
 
-<p>This sample demonstrates how to use the {@link android.media.MediaRouter}
-API to display content on a secondary display.</p>
-<p>To see this in action, run the sample and use the
-<strong>Media Route Action Item</strong> in the action bar to select an
-output device. If your device supports Miracast wireless displays, you may
-need to enable <strong>Wireless Display</strong> functionality in the
-system settings.</p>
-<p>You can also enable secondary screen simulation from the
-<em>Developer options</em> in the system Settings. Once
-connected, use the <strong>Change Color</strong> button to change the
-background color of the secondary screen.</p>
+<p>
+            
+            This sample demonstrates the use of the MediaRouter API to display
+ content on a secondary display.\n\nUse the "Media Route Action Item" in the ActionBar
+ to select an output device. If your device supports Miracast wireless displays,
+ you may need to enable "Wireless Display" functionality in the system settings.
+ Secondary screen simulation can also be enabled from the "Developer Options".\n\n
+Once connected, use the "Change Color" button to change the background color of the secondary screen.
+            
+        </p>

samples/browseable/BasicMediaRouter/res/values-v21/template-styles.xml

@@ -0,0 +1,22 @@
+<!--
+  Copyright 2014 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+  -->
+
+<resources>
+
+    <!-- Activity themes -->
+    <style name="Theme.Base" parent="android:Theme.Material.Light" />
+
+</resources>

samples/browseable/BasicMediaRouter/res/values/base-strings.xml

@@ -14,9 +14,6 @@
  See the License for the specific language governing permissions and
  limitations under the License.
 -->
-
-
-
 <resources>
     <string name="app_name">BasicMediaRouter</string>
     <string name="intro_message">