bluetooth: android: Create BluetoothRemoteGattServiceAndroid objects.

device/bluetooth/bluetooth_adapter_android.h

Index: device/bluetooth/bluetooth_adapter_android.h
diff --git a/device/bluetooth/bluetooth_adapter_android.h b/device/bluetooth/bluetooth_adapter_android.h
index c9db73f99f64dea48c52005c88122f13815a84c3..0d7da69e08235f8d4c1b8f0ca03a0478923f1e2d 100644
--- a/device/bluetooth/bluetooth_adapter_android.h
+++ b/device/bluetooth/bluetooth_adapter_android.h
@@ -82,6 +82,14 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterAndroid final
       const CreateAdvertisementCallback& callback,
       const CreateAdvertisementErrorCallback& error_callback) override;
 
+  // Returns BluetoothAdapter Observers for use by Android platform
+  // implementation classes to send event notifications. Intentionally not
+  // exposed on the public base class BluetoothAdapter as it is an
+  // implementation detail.
+  base::ObserverList<device::BluetoothAdapter::Observer>& GetObservers() {
+    return observers_;
+  }
+
   // Handles a scan error event by invalidating all discovery sessions.
   void OnScanFailed(JNIEnv* env, jobject caller);