Add two more bg dexopt job status code.

Also adds more comments to each status code.

Bug: 259799817
Test: Presubmit
Change-Id: If14e2bd62669164a8eccffcef6c3aae56310131b
Merged-In: If14e2bd62669164a8eccffcef6c3aae56310131b
(cherry picked from commit 29d15cb72cd3c2315c15896fc45c0a6f559189bb)
1 file changed
tree: e3fcc1a4c1fb74259f728a1cab8fabee94ac0ec7
  1. stats/
  2. OWNERS