Added atoms for adservices enrollment

Details:
1. Added atom for enrollment datastore transactions (reads/writes)
2. Added atom for enrollment downloads
3. Added atom for enrollment matching

Bug: b/278617677

Test: NA
Merged-In: I91a1999068b8cfc6ad3898df5f6bfd55045f95b8
Change-Id: I91a1999068b8cfc6ad3898df5f6bfd55045f95b8
4 files changed
tree: 8cba826dff0676e9f4a61894d39d65a90354e471
  1. stats/
  2. OWNERS