Add cross-profile metrics to proto file

This has been split out from the CL adding the metrics to unblock other
CLs.

Bug: 136249261
Bug: 149370554
Bug: 149318411
Bug: 149370875
Bug: 149370515
Test: none required as just a proto file change
Change-Id: I1c1b129449faed8f1ef43b0798e538b6637f188a