Camera VTS: Updated ColorSpaceNamed and color space tests.

BT2020_HLG and BT2020_PQ were adding since the ColorSpaceProfiles tests
were checked in. Add those to the ColorSpaceNamed enum.

Also remove unsupported color spaces from the list of 8-bit color spaces
to test, and change BT2020 to BT2020_HLG.

Test: Ran on Pixel 7.
Bug: 274789672
Change-Id: I9625a1f05017ccdcb383cdf8fd13084688acc79f