Cherry-pick sdk sandbox atoms messages

Test: manaully (m libstats_proto_host)
Bug: 301923349
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:4076c6608d1dc204753cbd69e2c5c4df6f09415b)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e049d919e8012b4e8cee5f4c3e3552cee3f33721)
Merged-In: I0f3332de525b64aaa9c305dc62d6417145157ffd
Change-Id: I0f3332de525b64aaa9c305dc62d6417145157ffd
Merged-In: I766fa6939efc92833081dfc80378e634ac696cc1
3 files changed
tree: fa16d6ef9d848f826159827bb3d3a4d5c7fccabe
  1. stats/
  2. OWNERS