Support Ycbcr sampler on Fuchsia. Bug: 154346346 Test: fx shell run "fuchsia-pkg://fuchsia.com/escher_waterfall#meta/escher_waterfall.cmx" Merged-In: I6e7239299c8ef0031d0b3431fccc1be9d6faff6d Change-Id: I5cf7276cf812f5c761025b2d833d550b3c78f1e5