[YUV AHB] Specialize state for operations using YUV AHB ExternalTextures

This CL builds on all the previous [YUV AHB] commits to detect in the
Vulkan command encoding that a specialization is needed to do 0-copy YUV
AHB sampling. It computes the specialization, set the specialized state
and run the command.

 - Adds end2end tests for OpaqueYCbCrAndroidForExternalTexture.
 - Adds an ExternalTexture end2end tests instantiation with the
   "vulkan_force_static_samplers_for_external_textures" toggle which
   mimics the specialization that needs to happen for YCbCr on devices
   that don't have it (it made it easier to test WIP code).
 - Enable OpaqueYCbCrAndroidForExternalTexture in the Vulkan backend
   when samplerYCbCrConversion is available.
 - Add a way to get specialized VkDescriptorSets for a specialization of
   a BindGroup's layout.
 - Handle the special case of Vulkan swizzling YCbCr differently than
   what the ExternalTexture yuvToRgb matrix expects.
 - Split ImmediateDataTracker and DescriptorSetTracker's Apply method to
   let custom state be passed, and add method to dirty the state.
 - When a pipeline is detected to need specialization, specialize the
   pipeline and apply the specialized state before doing the operation.

Bug: 468988322
Change-Id: I28fe6d07f7f1d2bd7dad4d8353550a36e2ebd1dd
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/297196
Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kyle Charbonneau <kylechar@google.com>