Add support for hfgw card profile in module-bluetooth-policy, just like
a2dp_source is handled.
In this case also the sink needs to be connected using module-loopback.
Instead of focusing on a2dp_source only, prepare the module to support
several profiles. It will be possible to enable/disable each of them
using module arguments.
I know that pa_streq() is defined with an extra parenthesis, but everytime I
look at it, it makes me nervous. :D
So it's better to add the parenthesis here.
This is a basic module for enabling loopback as soon as a new bluetooth A2DP
source is created. The module is given a source and a media role using command
line. This allows module-intended-roles or module-device-manager to choose a
target sink for the stream.
