Use permission WRITE_EXTERNAL_STORAGE up to SDK 29

Signed-off-by: Tim Krüger <t@timkrueger.me>

app/src/main/AndroidManifest.xml

@@ -62,7 +62,9 @@
     <uses-permission
         android:name="android.permission.USE_CREDENTIALS"
         android:maxSdkVersion="22" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="29" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />