[pdf] Modify drawPoints to handle perspective
[pdf] Modify drawPoints to handle perspective

SkPDFDevice::drawPoints would usually draw nothing in perspective when
ScopedContentEntry could not be created due to perspective. Handle this
the same way as the path effect case by using draw_points to handle this
through the more general drawPaths which can flatten the perspective.

Bug: skia:12572
Change-Id: Ieaac4d6d99319b3d189b73fc316706c581d516e5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/466377
Reviewed-by: Herb Derby <9e12a3d2bbf73546e47cc9958f6ba8f3215b7eaf@google.com>
Commit-Queue: Ben Wagner <53965154ffeecc4a10886eab9259e95965f2979a@google.com>

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