Move creation of AAQuadIndexBuffer to GrResourceProvider

This CL also increases the AAQuadIndexBuffer's size and centralizes the handling of index buffer constants.

Change-Id: I4fb679a1c5e4076cf249b612f798e9bf5a38cd0b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/251244
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
13 files changed