SkPDF: move type1 font code into single file

Change-Id: I0e0bf4cdb298b161cabf74eacc4b3950d7240643
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209172
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
7 files changed