Refreshes Accessibility core & service TEST_MAPPING files.

- Adds FrameworksCoreTests:android.accessibilityservice to
  services/accessibility/TEST_MAPPING postsubmit. These tests weren't
  covered by any other a11y TEST_MAPPING.
- Adds new TEST_MAPPING files, primarily in test dirs themselves.
  This ensures that test-only changes actually run their own tests.
- All of these TEST_MAPPING files now import
  services/accessibility/TEST_MAPPING which contains the superset
  of our tests. In general this is useful because many of our files
  affect tests outside their direct package (e.g. changing a Node
  property could affect a Service test). This minimizes config
  complexity at the cost of sometimes running too many tests.

Bug: 267225211
Test: atest --collect-tests-only \
        --test-mapping <path to files next to new TEST_MAPPING>
Change-Id: I674b93747f2f7e34b3038a07034029a982ac7f75
9 files changed