[spc] Launch SPC UX Refresh blink feature

Note that the SPC BBK feature was only launched on Android so changing
the status to only be `stable` for Android and `test` by default
as we are working on launching on other platforms (Desktop next).

Launch approval: http://launch/4397413
Chrome status approval: http://chromestatus/5206050462236672

Bug: b/416516356
Change-Id: I706caca96f344a40bbe97fbb065a95179e46dece
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6794106
Reviewed-by: Vladimir Levin <vmpstr@chromium.org>
Commit-Queue: Darwin Yang <darwinyang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1494302}