radio: move common RIL props / overlays to gee-common

squashed commits from the following:

- Add overlays to common (https://github.com/xboxfanj/android_device_lge_gee-common/commit/79b83c2d6044f9881301992babb8d6eb5174c6db)
- Move RIL defs to common (https://github.com/xboxfanj/android_device_lge_gee-common/commit/49d9bce243b790fd1eb93a807ba9791d567c4285)
- More Telephony props (https://github.com/xboxfanj/android_device_lge_gee-common/commit/ba644ee358756a2df42516851708b2558ac3a63f)
- Add support for RUIM/NV subscription type change (https://github.com/xboxfanj/android_device_lge_gee-common/commit/b04a96714fc5d06268b1d604bb82e13a701b8c48)

thanks to @xboxfanj / @chronuwiz13 & Mr.Gabo (XDA)