Do not allow ONS to be stopped by other apps am: 5a85287add am: c68c7e8f71 am: 7ab6bcd147 am: 364757d336

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/AlternativeNetworkAccess/+/11741804

Change-Id: Ibace34f980aa932cae526d2dc572585c0365ac74