Skip save layers where CTM isn't finite

In the old layer creation, I believe nan matrices were creating
non-finite bounds that then failed intersection tests, which led to no
layer or device being made. With the new system focusing on device-to-
device relationships, the nan's weren't impacting bounds but led to
issues inverting the global-to-device matrix.

It's better to just be explicit about this anyways.

Bug: chromium:1217062
Change-Id: I44e792d0bfad91025c5a727b6bcc74b09bdfcc44
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/419856
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed