ultrahdr: update metadata requirements

This updates metadata requirements for Version, GainMapMax, and
HDRCapacityMax to be required, and all others optional.

Also update the yuv-icc test image, since it seems this file was missed
on a previous CL, and the checked in version was 4:4:4 instad of 4:2:0,
which doesn't work with our decoder setup.

Bug: 286457050
Test: Added new tests, all tests pass
Change-Id: I1a6669f7bc6a8f254c4ce4ea4d359008e8e10f3e