Prevent the disabling of specified apps

Prevent the disabling of specified apps, avoiding cases
where disabling the app may result in an unusable system.

Bug: 200043113
Test: make RunSettingsRoboTests ROBOTEST_FILTER=ApplicationFeatureProviderImplTest

Change-Id: I0b298af76cec20e4f31ec7411bbf3200a2869035
Merged-In: I0b298af76cec20e4f31ec7411bbf3200a2869035
2 files changed