Add code to pull in the voice capabilities binding, subscribe to the
existing setDestination and cancelNavigation events, and use the data
that comes from them to set/clear the destination waypoint.

Bug-AGL: SPEC-3107

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Iaeb0283492cc89e8cff1a1558cab7554e32e3142