Take interactive bugreports on Android TV

We want to take a screenshot immediately, not after dumpsys finished.
This also gives the user some feedback that we took a screenshot when
they were paying attention, whereas the notification might go under
the radar if posted the 30-90 seconds later it will be shown
otherwise.

Also gives us the progress notification in the Android TV notification
tray, which helps the user keep track of what is going on and how long
it is expected to take.

Previously either no feedback was shown at all on key press, or a simple
Toast was shown on selecting the bugreport option from the TV Settings
app.

Test: Press DPAD_CENTER + BACK, observe screenshot and progress.
Fix: 151865303
Change-Id: I78753697a7867042d28364a6b6d61fdb96f8bc96