Add Aggregated Render Pass ID to Delegated Ink Metadata

This CL is a precursor to CL:5767323. Introduce render pass id as a
member of delegated ink metadata, which will help identify the render
pass to draw the delegated ink trail on during render pass draw. The
render pass id is assigned during surface aggregation, when it is
obvious which render pass would be most appropriate for the delegated
ink trail. At the moment, the render pass id is only used when
delegated ink is created via skia and not the platform.

The rationale behind adding render_pass_id to the delegated ink metadata
is that it is a more extensible approach compared to establishing a
direct pipeline between Surface Aggregator and the Skia renderer. It
allows for the future possibility of using the render pass id for
other ink renderers, such as DelegatedInkPointRendererGPU.

Bug: 41492167
Change-Id: Ia256283ec49437ea15dc7112393a9b8c16541e02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5906978
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Commit-Queue: Sahir Vellani <sahir.vellani@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#1363776}