Add OnDevicePersonalizationTraceEvent atom.

Flag: EXEMPT (bug 337358613)
Bug: 368093199
Test: atest
Change-Id: I0ac00152e586d206eacf124c5f61cba219c0ad21
2 files changed
tree: b9b4ef5154b0f85ce023b382e89e54cc61abe680
  1. stats/
  2. OWNERS