Modify bluetooth test cases GB for new HC APIs

Modify bluetooth stress tests pairing and connection test cases for new
honeycomb bluetooth APIs and severly refactor code, including better
organization of broadcast receivers, using broadcast receivers to record
the time (instead of getting the time at the end of the poll).

Change-Id: I3ef28d54d1a013697f67f4c7c8a96aaadcc747d9