Separate libcore API from non-updatable API

- Add the classes now missing from non-updatable to
  incompatibilities.txt.

- Add the libcore APIs released in API 30 to a new txt file that is used
  to track compatibility of the ART API going forward.
  These files were created with this script:
  https://paste.googleplex.com/5730097140072448

Bug: 173606718
Test: m checkapi
Test: last_released check of art
Test: manual last_released check of entire API surface (b/174847574 to
      automate)
Merged-In: I6337fdc6d6bb257263ba98c128af370ab9d663a6
Change-Id: I6337fdc6d6bb257263ba98c128af370ab9d663a6
3 files changed