Various updates and cleanups
ariesve: Enable IPv6 tethering

* our kernel is already supporting this
ariesve: Set default locale to en_GB
lpm: Updated offmode charging binaries

* from SPH-M840
prop: Set max background service to 4
overlay: Don't show mobile plan preference

Change-Id: I147b574e9e68dc6af004bef31d27e87f1f90d1f7