Merge changes from topic "nullablecollection"

* changes:
  API: Suppress existing NullableCollections lints (TaskOrganizer)
  API: Suppress existing NullableCollections lints
tree: d3d2bfc0c78c49010bf750d8dd772c615291a430
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS