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This CL adds the bridge to java, as well as basic showing and hiding
logic.

Bug: 986317
Change-Id: Iec8a65a7c025da71505b16487e2070234ea58fda
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1763677
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#689538}