Updater: Define foregroundServiceType

Required since Android 14 [1].

11-16 14:05:45.363 20623 20623 E AndroidRuntime: FATAL EXCEPTION: main
11-16 14:05:45.363 20623 20623 E AndroidRuntime: Process: org.lineageos.updater, PID: 20623
11-16 14:05:45.363 20623 20623 E AndroidRuntime: android.app.MissingForegroundServiceTypeException: Starting FGS without a type  callerApp=ProcessRecord{6d14558 20623:org.lineageos.updater/u0a149} targetSDK=34

[1] https://developer.android.com/about/versions/14/changes/fgs-types-required

Change-Id: Id6217424177b94d37621062fb1a55778f1dabbab