Revert "Change the routing path of bluetooth headset connections."

Changes the way to bind to HeadsetService. Changes are causing
memory leaks and stability issues.

This reverts commit e8b98925d08f720c4d22b626d0650de536840a9a.

CRs-fixed: 934279
Change-Id: Ic2820d2e51581a6c9987028265a90fccd64e3c68
5 files changed