Replace SK_ARRAY_COUNT with std::size() for skia/src/core

Change-Id: I8d8eee2b2515e1f9961b408245a1f6bc3e820d14
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/554341
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
19 files changed