bluetooth: set better priorities for profiles

bluetooth: set better priorities for profiles

Since HSP had higher priority than A2DP, the default profile when
connecting a new headset was HSP. To me it makes more sense to default
to high-quality output. We already have some automatic policies to
switch to HSP when it's needed.

I also made the A2DP source and HSP/HFP gateway profiles have lower
priority than the A2DP sink and HSP headset profiles. The A2DP source
and HSP/HFP gateway profiles should only be activated if the remote
device initiates audio streaming, so it makes sense to have lower
priority for those profiles.

BugLink: https://bugs.freedesktop.org/show_bug.cgi?id=103058