disable ACRA for now

mailbox-android/src/main/java/org/briarproject/mailbox/android/MailboxApplicationImpl.java

@@ -87,7 +87,7 @@ public class MailboxApplicationImpl extends Application
 		super.attachBaseContext(
 				Localizer.getInstance().setLocale(base));
 		setTheme(base, prefs);
-		ACRA.init(this);
+		//ACRA.init(this);
 	}
 
 	@Override