A little refactoring to keep most everything for these "temporary"
flags in one place.
Bug: 5348373
Change-Id: I257aac616ae635e6f9d9dffd692357b4c08037e2
This toggles persist.radio.imsallowmtsms between 0/1 which can
be used during testing and bring up of SMS over IMS.
Change-Id: I4581bca76899445e825260e8af6a39903d029c44
The extracted bits will move into the HTC vendor tree, and it (or
similar settings for other vendors) can be accessed via a generic
OEM_RADIO_INFO activity.
Addresses issue:
http://buganizer/issue?id=1645706
Change-Id: Iec5461bcb3e241a1230f5f6d53baa3bb838ff4a9