Add a new notification api usage logging for CANCEL_ALL

Corresponding G3 CL: cl/752677414

Test: Build pass & atest
BUG: 410009802
Flag: com.google.wear.services.infra.flags.notification_id_unification
Change-Id: Ic4c8edec88842ac72338610c210b8817b50d4d2c
1 file changed
tree: 4310edaf780016914213d25ab9e00e32c24f2207
  1. stats/
  2. OWNERS