Extract api_versions_defaults from api_versions_* modules

Splits the `api_versions_*` modules into two types:
* Those that include the whole API surface including updatable modules
  and SDK extensions.
* Those that do not include updatables modules or SDK extensions.

Bug: 336993217
Test: m nothing and TH
Change-Id: Ic3d95832a30a7a5e7c4a09febd818b1aebbf17d0