connman: SHR distribution: ignore the htcdream's network interfaces

connman: SHR distribution: ignore the htcdream's network interfaces

The SHR images uses iliwi by default, which call udhcpc,
  udhcpc blocks near the end:
    Lease of 192.168.1.147 obtained, lease time 600
    [blocked here,"adding dns 192.168.1.1" not shown]

The routes contain problematic lines such as(rmnet interface is normal):
  default         *               0.0.0.0         U     0      0        0 rmnet0

So we have default routes that point nowhere,
if we try to remove theses routes, connman recreates them.
So in order to make the default wifi GUI work we make connman ignore theses interfaces:
  Jun 15 17:25:20 <holtmann>      If that interface is under ConnMan control, then you are out of luck with running anything manuallay.
  Jun 15 17:25:40 <holtmann>      However connmand -I wlan0 will make it stay away from that interface.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>