Adding/modifying tests for new 2.3 API

Adding new tests for getPerFrameMetadataKeys_2_3 and
getHdrCapabilities_2_3.  Modifying for optional API
to not error on UNSUPPORTED

Bug: 118343714
Test: ./VtsHalGraphicsComposerV2_3TargetTest
Change-Id: I66e28cc1cb51b8c26d3e7777311a168086f938ca
1 file changed