Update sdk.atree and samples/browseable for lastest samples release

Synced to developers/samples/android commit
97b2cfe5ba6d8fa8daaf3273141b321b5fe9e910.

Change-Id: I360cfa147e71dd519b841df41b4e878f86b9b27b

samples/browseable/DeviceOwner/src/com.example.android.deviceowner/MainActivity.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+package com.example.android.deviceowner;
+
+import android.app.Activity;
+import android.app.Fragment;
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.os.Bundle;
+import android.util.Log;
+
+public class MainActivity extends Activity {
+
+    private static final String TAG = "MainActivity";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main_real);
+        if (savedInstanceState == null) {
+            DevicePolicyManager manager =
+                    (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
+            if (manager.isDeviceOwnerApp(getApplicationContext().getPackageName())) {
+                // This app is set up as the device owner. Show the main features.
+                Log.d(TAG, "The app is the device owner.");
+                showFragment(DeviceOwnerFragment.newInstance());
+            } else {
+                // This app is not set up as the device owner. Show instructions.
+                Log.d(TAG, "The app is not the device owner.");
+                showFragment(InstructionFragment.newInstance());
+            }
+        }
+    }
+
+    private void showFragment(Fragment fragment) {
+        getFragmentManager().beginTransaction()
+                .replace(R.id.container, fragment)
+                .commit();
+    }
+
+}