floss: plumbing (dis)connection direction to btif

Whether (dis)connection is initiated by the host or by the peer is
an information worthy of being logged by metrics. Therefore,
surfacing it.

Bug: 240782154
Tag: #floss
Test: Verify connection direction is properly passed

BYPASS_LONG_LINES_REASON: Bluetooth likes 120 lines

Change-Id: I41f5b1333eded0c23459a58a5535258ebace7e3c