Update browseable samples for lmp-docs

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

Change-Id: I3fec46e2a6b3f196682a92f1afd91eb682dc2dc1

samples/browseable/CardReader/AndroidManifest.xml

@@ -21,7 +21,7 @@
     android:versionName="1.0">
 
     <!-- NFC Reader Mode was added in API 19. -->
-    <uses-sdk android:minSdkVersion="19" android:targetSdkVersion="19" />
+    <!-- Min/target SDK versions (<uses-sdk>) managed by build.gradle -->
     <uses-permission android:name="android.permission.NFC" />
     <uses-feature android:name="android.hardware.nfc" android:required="true" />
 

samples/browseable/CardReader/_index.jd

@@ -1,20 +1,14 @@
-
-
-
 page.tags="CardReader"
 sample.group=Connectivity
 @jd:body
 
 <p>
-  This sample demonstrates how to implement a low-level NFC card reader, for
-  reading cards that do not contain NDEF or Android Beam data. This sample is
-  designed to read the virtual loyalty card implemented in the <a href=
-  "{@docRoot}samples/CardEmulation/index.html">CardEmulation</a> sample.
-</p>
+            
+            This sample demonstrates how to implement a low-level NFC card reader, for reading cards
+            that do not contain NDEF or Android Beam data. This sample is designed to read the virtual
+            loyalty card implemented in the "CardEmulation" sample.\n\n
 
-<p>
-  In particular, this sample demonstrates how to disable Android Beam, select
-  which AIDs the reader is interested in, and establish communication with the
-  card. See <a href="{@docRoot}guide/topics/connectivity/nfc/hce.html">Host-based
-  Card Emulation</a> for more information on the HCE APIs.
-</p>
+            In particular, this sample demonstrates how to disable Android Beam, select which AIDs the
+            reader is interested, and establish communication with the card
+            
+        </p>

samples/browseable/CardReader/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/CardReader/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">CardReader</string>
     <string name="intro_message">

samples/browseable/CardReader/src/com.example.android.cardreader/MainActivity.java

@@ -14,9 +14,6 @@
 * limitations under the License.
 */
 
-
-
-
 package com.example.android.cardreader;
 
 import android.os.Bundle;
@@ -50,10 +47,12 @@ public class MainActivity extends SampleActivityBase {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
-        CardReaderFragment fragment = new CardReaderFragment();
-        transaction.replace(R.id.sample_content_fragment, fragment);
-        transaction.commit();
+        if (savedInstanceState == null) {
+            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+            CardReaderFragment fragment = new CardReaderFragment();
+            transaction.replace(R.id.sample_content_fragment, fragment);
+            transaction.commit();
+        }
     }
 
     @Override