Add (c) to source files

Author: microbit-sam

src/main/java/org/microbit/android/partialflashing/HexUtils.java

@@ -18,6 +18,10 @@
  * A Class to manipulate micro:bit hex files
  * Focused towards stripping a file down to it's PXT section for use in Partial Flashing
  *
+ *   (c) 2017 - 2021, Micro:bit Educational Foundation and contributors
+ *
+ *  SPDX-License-Identifier: MIT
+ *
  */
 
 public class HexUtils {

src/main/java/org/microbit/android/partialflashing/PartialFlashingBaseService.java

@@ -30,6 +30,10 @@
 /**
  * A class to communicate with and flash the micro:bit without having to transfer the entire HEX file
  * Created by samkent on 07/11/2017.
+ *
+ * (c) 2017 - 2021, Micro:bit Educational Foundation and contributors
+ *
+ * SPDX-License-Identifier: MIT
  */
 
 // A service that interacts with the BLE device via the Android BLE API.