Convert over more sites to SkStrikeSpecStorage, and remove unused calls

Convert over remaining callsights for strike lookup, and reduce the SkStrikeCache
API.

- one friend decl.

Change-Id: I109a747061030f26ff908472ea55a4424d5c10f1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209109
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
8 files changed