Move StrikeCache and TextBlobCache to RecordingContext

TBR=bsalomon@google.com
Change-Id: I09a918eee4fab2091b0cbbbe83bc66418e43045e
Reviewed-on: https://skia-review.googlesource.com/c/193471
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
7 files changed