Define atoms and ID for RCS

Define atoms, ID to store and pull RCS  Single Registration metrics.

Bug: b/174871215
Bug: b/199550552
Test: build pass
Change-Id: I8edbe45789b6651f1882a568b182c69df0b0a6d6
Merged-In: I8edbe45789b6651f1882a568b182c69df0b0a6d6
2 files changed
tree: 5e4987639d4e928f54838e54cff4131754b72f2d
  1. stats/
  2. OWNERS