Update previous_api for droidstubs and java_api_library

Needed to ensure recently added nullability annotations `@Nullable` and
`@NonNull` are correctly replaced with `@RecentlyNullable` and
`@RecentlyNonNull` respectively.

Bug: 347751326
Test: # Build modules before and after this change and verify that
      # public stubs are unchanged but other stubs use the correct
      # nullability annotations.
Change-Id: If97859b6207f03c1dcd3a0cc9c44f82147449cad