Fix format

Signed-off-by: Stefan Niedermann <info@niedermann.it>

src/main/res/layout/multiple_accounts.xml

@@ -1,4 +1,5 @@
-<?xml version="1.0" encoding="utf-8"?><!--
+<?xml version="1.0" encoding="utf-8"?>
+<!--
   Nextcloud Android client application
 
   @author Tobias Kaminsky