Revert "Temporarily disable `art_standalone_odrefresh_tests` in Mainline tests."

This reverts commit 191278bfe8b782d352f7b9e5406b765aa6f3097a.

Reason for revert: The issue that prompted the deactivation of
`art_standalone_odrefresh_tests` in Mainline tests (b/206335809) has
been addressed.

Test: m mts && mts-tradefed run commandAndExit mts-art
Test: m mts && mts-tradefed run commandAndExit mts-art-shard-00
Test: m mts \
        && mts-tradefed run commandAndExit mts-art \
             --module art_standalone_odrefresh_tests
Bug: 206335809
Change-Id: Ie46532e46756a77f829c083458a54eb98eae53d5
2 files changed