Add RELEASE_BUILD_FLAGS_IN_PROTOBUF

This will guard the conversion to using protobufs for build flags.

To ease testing for those working on the migration, add a temporary
release config "protobuf_flags" which is === "trunk_staging", with
RELEASE_BUILD_FLAGS_IN_PROTOBUF=true.

Bug: 328495189
Test: manual
Change-Id: I7d40e5bb923cf84609e2f3a3cbd47c5a5d03a983
Merged-In: I7d40e5bb923cf84609e2f3a3cbd47c5a5d03a983
4 files changed
tree: 7f3b7a32e5eecb7572e6ae724c6ce336e7b31841
  1. aconfig/
  2. build_config/
  3. build_flags.scl
  4. OWNERS
  5. release_config_map.mk