uhid: Add host and peer address to uhid attributes

Match what bluez does when creating a uhid device and set the host
address as attr{phys} and the peer address as attr{uniq}.

BUG=b:141992588
TEST=cros deploy to eve, connect LE keyboard and verify with
     udevadm info -a -p /sys/devices/virtual/misc/uhid/.../input/...

Change-Id: I705b83104c5db8319d1997ac9ff0304282a7d169
9 files changed