Prefer the non package-private version of annotations library

Potential fix for b/394547648.

Some java_sdk_library modules require annotations. To enable IDE
integration for such libraries, prefer `stub-annotations` over
`private-stub-annotations`.

Test: go build . (compiles)
Test: will try to repro b/394547648 after this CL is merged.
Bug: 394547648
Change-Id: I6cce7f4678d87da71983187383669223ca60301e