rutabaga_gfx: conditionally enable capsets based RutabagaBuilder input
rutabaga_gfx: conditionally enable capsets based RutabagaBuilder input

If the context_mask is specified, only advertise those capability sets.

If not specified, for backwards compatibility, use the older behavior.
Eventually, the older beahvior may be deprecated.

BUG=b:230100768
TEST=gfxbench, android games in arcvm

Change-Id: I3c37f94dfb5df25831d187deff600027aac2382d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3636798
Reviewed-by: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Auto-Submit: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@chromium.org>
Reviewed-by: Gurchetan Singh <99434bba058e25b6203b8ae055a4f697dad0ef64@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm