Add individual API tracking files for modules

This adds metalava api tracking generation to the module
stub rules, to make sure we know exactly what API a
particular module stub exports.

Bug: 147768409
Test: m update-api check-api
Exempt-From-Owner-Approval: rebase + m update-api
Change-Id: Iaf2ef5b5751eb208d119ddbc74481239366fe581
6 files changed
tree: 5ec02d6b71b4b1bb3f25863b8975c536a12f45ad
  1. Tethering/