Add standalone ART gtests to `TEST_MAPPING` group `presubmit`.

Output of `art/test/utils/regen-test-files`:

  $ art/test/utils/regen-test-files
  Generated Blueprint files for 625 ART run-tests out of 928 (67%).
  Generated TEST_MAPPING entries for 376 ART run-tests out of 928 (40%):
    376 ART run-tests (100%) in `mainline-presubmit` test group.
    376 ART run-tests (100%) in `presubmit` test group.
     17 ART gtests (100%) in `presubmit` test group.
      0 ART run-tests (0%) in `postsubmit` test group.

(cherry picked from commit e0386f10d4591afa9823658099e4f2ac7a693255)

Test: atest --test-mapping art:presubmit
Test: Rely on TreeHugger presubmits
Bug: 193218514
Bug: 152379281
Change-Id: Ibfcf212a4bc3094ca74f8f3c0f98469810c6ea19
Merged-In: Ibfcf212a4bc3094ca74f8f3c0f98469810c6ea19
2 files changed