Apply word spacing upon reaching the start of the next word

See https://github.com/flutter/flutter/issues/113517

Change-Id: Ia5867b8bfc4a5f2646235ab5f8331769fba809cf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/597256
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Jason Simmons <jsimmons@google.com>
4 files changed