charge_only_mode: Allow to work with Moto G

Change-Id: I9debd7958c0cb100134d1288421a84d6082f9760
selinux: Fixes for moto_msm8960 devices to enable enforcing

Change-Id: I5cf3e8d064a6497279defff3e1f9c55e8779ee3b
Remove unnecessary usbnet function in MTP+ADB mode.

With usbnet included in the current configuration, causing ADB not functioning.
On windows system, a device (usbnet) detected with no driver provided by Motorola.
Removing usbnet make MTP+ADB mode working normally.

Change-Id: Ifab1650aee512949a1943de9e55496855f699260