FlaggedApi: enable enforcement for all non-updatable APIs

(cherry pick of 7da1d25541124cf0c6ced6eb0af738fb9263b77a
 and 38dd161e4f88b43e7d251f8888714d79c2557b7f)

Bug: 297362755
Test: make checkapi
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:36d19aea70de000f45f55e72b8c1ba86ae6e6629)
Merged-In: I4d384efac8a8d3b183d9b207b195ad5489db9e55
Change-Id: I4d384efac8a8d3b183d9b207b195ad5489db9e55
7 files changed