GitLab

This CL adds the code to open the message center after unlocking if user
clicks the inline reply button on the lock screen.

We also need to focus the target notification but let me leave it to the
separate CL.

Bug: b/79951342
Test: manual

Change-Id: I7d47e4064d0a85dc144d2895ae34c85789acf9d9
Reviewed-on: https://chromium-review.googlesource.com/c/1314022Reviewed-by: Tetsui Ohkubo <tetsui@chromium.org>
Commit-Queue: Yoshiki Iguchi <yoshiki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605253}