broadcaster: Enable and improve logging

This enables all the logs for debugging. Once the broadcast
is stable enough this should be revisited.

Bug: 150670922
Tag: #feature
Test: atest bluetooth_test_broadcaster bluetooth_test_broadcaster_sm
Sponsor: jpawlowski@

Change-Id: I82d0b05864f90bbfe7988157a43d3d3b36c7c1e4