Additional logging for bond information

Log the bond state, the funciton that updated the bond state, as well as the
device that was updated. Also added in functionality for protobuff logging.

Example output
Bond Events:
  Total Number of events: 8
  Time          BD_ADDR            Function             State
  00:01:12.353  ac:9e:17:07:58:d8  btif_dm_create_bond  BOND_STATE_NONE
  00:01:12.354  ac:9e:17:07:58:d8  bond_state_changed   BOND_STATE_BONDING
  00:01:13.999  ac:9e:17:07:58:d8  bond_state_changed   BOND_STATE_BONDING
  00:01:14.778  ac:9e:17:07:58:d8  bond_state_changed   BOND_STATE_BONDED
  00:01:14.827  ac:9e:17:07:58:d8  bond_state_changed   BOND_STATE_BONDED
  00:01:31.534  34:36:3b:c4:bf:99  btif_dm_create_bond  BOND_STATE_NONE
  00:01:31.535  34:36:3b:c4:bf:99  bond_state_changed   BOND_STATE_BONDING
  00:01:32.771  34:36:3b:c4:bf:99  bond_state_changed   BOND_STATE_BONDING

Change-Id: I01ab3a232300203704a356a17aa045e638f97463