Add package name based APIs to PlatformCompat.

The APIs behave the same as the AppInfo APIs, and returns the change is
enabled if there is no installed package with the provided name.

Test: flashed device, used the test app, and made the API use the new
      per-package API.
Bug: 138275545

Change-Id: Ic925751dddc6c2e0996fe195a208f5c689554839