graphics.common: add HSV format definition to 1.2

Adds HSV format used in some color sampling engines to the list
of pixel formats. Rev the sampling engine in composer to reference
the new format revision.

Test: built image, with new format reported in vendor code.
Test: VtsHalGraphicsComposerV2_3TargetTest
Fixes: 122943743

Change-Id: I1b454a86f464f38e3c2cbeef5379a187ff38ab06