Fill in the GrTriangulatingPathRenderer::onPrePrepareDraws
Fill in the GrTriangulatingPathRenderer::onPrePrepareDraws

This will allow multiple DDL recording threads to share triangulated
path data.

Bug: 1108408
Change-Id: Idf204c1bb3dd03d3e1d5419c320e527bf348e38b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/325576
Commit-Queue: Robert Phillips <95e8ac5504948c7bf91b22c16a8dbb7ae7c66bfd@google.com>
Reviewed-by: Adlai Holler <74c8d5b16bacf4a5997d6535bb4043bbdfe052ea@google.com>

google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia