Use test font manager for SVG fuzzer

Change-Id: Ia4f96278e076d300b432b362db5df6b1a1654f3d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/301218
Commit-Queue: Zepeng Hu <zepenghu@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
1 file changed