Bug#605486: libcanberra0: should at least Recommend libcanberra-pulse

[Bob Ham]

Package: libcanberra0
Version: 0.30-3
Followup-For: Bug #605486

We have come up against this issue working on the Librem 5 phone.
There is a discussion here:

  https://source.puri.sm/Librem5/librem5-base/merge_requests/12#note_9784

Guido suggests a new virtual package, libcanberra-audio-backend,
provided by backends and then have libcanberra consumers have
something like: 

  Depends: libcanberra-pulse | libcanberra-audio-backend

What are your thoughts on this?


Thanks,

Bob