Add SPDX header

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/res/drawable/ic_note_to_self.xml

@@ -1,25 +1,9 @@
 <!--
-  ~ Copyright (c) 2023 Nextcloud Talk application
+  ~ Nextcloud Talk - Android Client
   ~
-  ~ Permission is hereby granted, free of charge, to any person obtaining a copy
+  ~ SPDX-FileCopyrightText: 2024 Its original authors
-  ~ of this software and associated documentation files (the "Software"), to deal
+  ~ SPDX-License-Identifier: MIT
-  ~ in the Software without restriction, including without limitation the rights
-  ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-  ~ copies of the Software, and to permit persons to whom the Software is
-  ~ furnished to do so, subject to the following conditions:
-  ~
-  ~ The above copyright notice and this permission notice shall be included in all
-  ~ copies or substantial portions of the Software.
-  ~
-  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-  ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-  ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-  ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-  ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-  ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-  ~ SOFTWARE.
 -->
-
 <vector
     android:height="24dp"
     android:width="24dp"

app/src/main/res/drawable/ic_talk.xml

@@ -2,7 +2,8 @@
 <!--
   ~ Nextcloud Talk - Android Client
   ~
-  ~ SPDX-FileCopyrightText: Nextcloud GmbH
+  ~ SPDX-FileCopyrightText: Nextcloud GmbH. All rights reserved.
+  ~ SPDX-License-Identifier: GPL-3.0-or-later
 -->
 <vector android:autoMirrored="true"
     android:height="24dp"