bluetooth: android: Implement Characteristic GetIdentifier, fix Service IDs too.

device/bluetooth/bluetooth_gatt_descriptor.h

Index: device/bluetooth/bluetooth_gatt_descriptor.h
diff --git a/device/bluetooth/bluetooth_gatt_descriptor.h b/device/bluetooth/bluetooth_gatt_descriptor.h
index c91de1cc3775f4e7134316e818ad0d70eb231829..00e49ea19243f7724abb0c7e3c84cbd6af71b6d6 100644
--- a/device/bluetooth/bluetooth_gatt_descriptor.h
+++ b/device/bluetooth/bluetooth_gatt_descriptor.h
@@ -138,7 +138,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothGattDescriptor {
   // Identifier used to uniquely identify a GATT descriptor object. This is
   // different from the descriptor UUID: while multiple descriptors with the
   // same UUID can exist on a Bluetooth device, the identifier returned from
-  // this method is unique among all descriptors of a device. The contents of
+  // this method is unique among all descriptors on the adapter. The contents of
   // the identifier are platform specific.
   virtual std::string GetIdentifier() const = 0;