Update the API signature files to include annotation methods

Metalava replicated doclava behavior and did not include annotation
methods in the signature (.txt) files. This change configures metalava
to include the annotation methods and updates the signature files.

Note, this only affects the signature files, the stub files already
contained all the methods.

Bug: 119861512
Bug: 117818301
Test: m update-api
Change-Id: If52f101400865df1f4aad579c563fc5e4cc0f0f2
4 files changed