Ability to block updates/installations of Explore, Oculus Assistant Service, and Guidebook

[DevanWolf]

The updates for those bloatware come back in a while from Oculus Core Mobile Services after uninstalling their updates. This is a problem because I want to keep those 3 disabled and not have it enabled by itself again.

The following package names that Oculess requests to block updates: com.oculus.explore com.oculus.assistant com.oculus.guidebook