Make LinkifyOptions public. RELNOTES: n/a
Make LinkifyOptions public.
RELNOTES: n/a

PiperOrigin-RevId: 421908640
Change-Id: Ib9b523777a4b46d5f28d3734677203b3e7afc063

google/closure-library,google/closure-library,google/closure-library,google/closure-library,google/closure-library