Add POST_NOTIFICATIONS permission and pre-grant it
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 8fcb13f..33c9053 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -16,6 +16,8 @@
     <!-- This is needed to check for internet access when backup is stored on network storage -->
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
     <!-- This is needed to retrieve the available storage roots -->
     <uses-permission
         android:name="android.permission.MANAGE_DOCUMENTS"