Mark rvc-dev-plus-aosp as S

It's an aosp-master based branch.

Exempt-From-Owner-Approval: previously reviewed in I00ea240610148cc71bd6043c2be1d0e539031404

Bug: 150754986
Test: treehugger
Change-Id: If2b4bbf3c9a761db8d4b37c3f348fa562818cf25
Merged-In: If2ea213b565504267ed9f6f1fa9458ad6724c28f
21 files changed