So that these can be built independently from the large sdk zip. The old
Make-based implementation created this as part of the large sdk zip,
then extracted it from that zip file.
This topic only adds the new definitions under a different filename,
full replacement will come in a follow-on CL.
Once we fully transitions to this mechanism, we'll be able to turn down
most modules on Macs, only building these and their dependencies.
Bug: 187222815
Change-Id: If6be8dd573a323ef8b343bc86116ffa3d43922a5
17df46e334