Various updates and cleanups
Enable IPv6 tethering

* our kernel is already supporting this
lpm: Updated offmode charging binaries

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

Change-Id: I147b574e9e68dc6af004bef31d27e87f1f90d1f7
Set default locale to en_GB
Revert "Set resampler quality"

This reverts commit d2c11e0c46d5d26df9b9967492dec30e357a175d.