Remove old dhcp leases on boot to prevent 'Obtaining IP Address' loop

Change-Id: Ib602b363ce3a6f0c4181efae3751cf16dea3000c
Remove lockscreen.rot_override, it's a user-configurable option now

Change-Id: I9ccba420c8b1eb359394eef7dd644ddea4f4fc1a
Merge remote-tracking branches 'rqdev/cm-10.1' and 'rqkang/cm-10.1' into cm-10.1