bluetooth: Stub out BluetoothAdapterAndroid

device/bluetooth/bluetooth_adapter_android_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/memory/ref_counted.h"
+#include "device/bluetooth/bluetooth_adapter_android.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace device {
+
+class BluetoothAdapterAndroidTest : public testing::Test {
+ protected:
+  BluetoothAdapterAndroidTest() {
+    adapter_ = BluetoothAdapterAndroid::CreateAdapter().get();
+  }
+
+  scoped_refptr<BluetoothAdapter> adapter_;
+};
+
+TEST_F(BluetoothAdapterAndroidTest, Construct) {
+  EXPECT_TRUE(adapter_.get());
+}
+
+}  // namespace device