Move RCS apps to system-ext

Moving RCS apps to system-ext to allow vendors to include RCS
apps in makefiles if they still use them.

Bug: 178489990
Test: make targets
Change-Id: I3985002417d578060aca36022dbd507d8f7ad5b9
4 files changed
tree: a9183555fc75016f54e59b79ba3bff549b28eb7f
  1. rcs/
  2. METADATA
  3. OWNERS