Merge pull request #97 from jkangas/master

Request for pulling searching state hiding only if already notified registered to main branch
Merge pull request #99 from jkangas/master

Request for pulling configurable LTE support to main branch
[rilmodem] Check and set tech prefence as configured

After flashing modem uses default technology preference of it's
own. This fix forces it to 3G/2g only, if configuration is set
so.

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>