[fuchsia] Update path to fuchsia.fonts

This interface is now defined in the //sdk directory.

Change-Id: Idfa7208a2d5aa36e3268e84b44ec5b4f47da6dde
Reviewed-on: https://skia-review.googlesource.com/c/190145
Auto-Submit: Adam Barth <abarth@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed