Share Wear bugreport right after it is taken

In rvc-wear-dev, bugreports were not shared to phone until user tapped
on the bugreport-complete notification. Now, we are sending bugreports
to phones immediately after bugreport is taken. We still retain the
bugreport-complete notification. The bugreport-complete notification
will have an action button that leads the user to a bugreport-warning
screen as long as the user has not opted out from seeing the warning.
If the user chooses not to see that message again (which they can do
in the warning screen), there will not be any action button on the
bugreport-complete notification, and the user can just swipe to
delete it. Refer to the look of the notification when no warning message
is to be displayed (https://screenshot.googleplex.com/JStqotLwCaTXeL9)
and when a warning message is to be displayed (https://screenshot.googleplex.com/AdGKWFqbky8Ad8s)
Note: this change does NOT affect the functionality of the
BugreportProgressService for any other device except Wear devices.

Bug: 163083307
Test: the described feature tested with salmon running rvc-wear-dev
Change-Id: If6890ef8cada60e454c9232d402bbdb8a1b0315e