Adjust `regen-test-files` to match the current `TEST_MAPPING` output.

Manual modifications made to the `TEST_MAPPING` file have been merged
into AOSP with the release of Android 11 (R); adjust script
`test/utils/regen-test-files` to generate a `TEST_MAPPING` output
identical to the current file.

Test: Run `art/test/utils/regen-test-files` and check `TEST_MAPPING`
Test: atest --test-mapping art:presubmit
Bug: 140373913
Change-Id: I1a6578e895547e0a49063d6b72315317a2a4ff2f
1 file changed