[automerger skipped] Merge "Add missing nullability annotations."
am: 61789bab0c -s ours
am skip reason: change_id I109260842cfc25f06e40694997fcbb4afa02c867 with SHA1 8fae993514 is in history

Change-Id: I7b2712e4ab3635f94f8257d88f24c20bc68a3ac0
tree: 47bae27f48960c5182286d05bb93159ced4f0a48
  1. core/
  2. services/
  3. tests/