global: fix up copyrights

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/java/com/wireguard/android/widget/KeyInputFilter.java

@@ -1,5 +1,6 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 

app/src/main/java/com/wireguard/android/widget/NameInputFilter.java

@@ -1,5 +1,6 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 

app/src/main/java/com/wireguard/android/widget/ToggleSwitch.java

@@ -1,17 +1,6 @@
 /*
- * Copyright (C) 2013 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.
+ * Copyright © 2013 The Android Open Source Project
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.widget;