jewel: enable native tethering

Set ro.telephony.tetherdunrequired=0 in build properties to allow for
native tethering

Change-Id: I2c5be42cf13080e7793309d1dc996ddb56f8f34f
jewel: tweaks

remove all but en_us locale and use ccache

Change-Id: I4e02fce9e5859590e9ceb1dbfec93b97bd0b90a9
jewel: Increase MMS defaults

*Increase MMS file size limit to 5MB
*Increase MMS image size to 3456x3456
*Lower minimum thread size to 5 and raise maximum to 75
*overlays

Change-Id: Ife6f3bf5fb7ed7ba3887721740eef39e22020e1f
[WIP] jewel: add support for new partition layout

If possible changes should try to preserve functionality for all device

Thanks goto CaptainThrowback for the updated twrp.fstab
ref: https://github.com/CaptainThrowback/omni_device_jewel_TWRP

Change-Id: Ifefbd2128dbeed40828538d5c27ae56fd1849499