Migrate libartservice to real PackageState APIs

Now that the system APIs are available, the wrapper classes can be
removed and the real methods invoked.

Split indexing has changed with the new APIs, so some code was adjusted
to compensate, and some methods locations were moved. Otherwise this is
mostly a naming change.

Bug: 235462722
Bug: 244479008

Test: atest ArtServiceTests

Ignore-AOSP-First: ART Services.

Change-Id: I964f611195a2af91dbf08079510f04e4cba63476
25 files changed