Update git submodules

* Update platform/art from branch 'master'
  to 9a1a5a9ae8611c0eb7dd5bfaffc8682eea3ee7c7
  - Regenerate ART test files to reinclude ART Checker tests.
    
    This partly reverts commit 463255b4f1fcc8c34856a6b0780cf5ef238941c2.
    
    Reason for revert: Checker support in test suites is complete.
    
    Output of `art/test/utils/regen-test-files`:
    
      $ art/test/utils/regen-test-files
      Generated Blueprint files for 621 ART run-tests out of 919 (67%).
      Generated TEST_MAPPING entries for 379 ART run-tests out of 919 (41%):
        18 tests (5%) in `mainline-presubmit` test group.
        189 tests (50%) in `presubmit` test group.
        190 tests (50%) in `postsubmit` test group.
    
    Test: atest --test-mapping art:all
    Test: m mts && mts-tradefed run commandAndExit mts-art
    Bug: 169852871
    Bug: 162408889
    Change-Id: Ic081869d6629776c0d70e8ceb3c2e9f0d3bf0caa
    
1 file changed