Add `art_standalone_libartpalette_tests` to CTS.

Test: m cts \
        && cts-tradefed run commandAndExit cts \
             --module art_standalone_libartpalette_tests
Bug: 206657939
Bug: 162834439
Change-Id: If9c72b05156c841d8eb8a1c5ab3b925fc0e8d588
3 files changed