Added two more types of data bearer
Use system selection smarter to speed up connect

A lot of the initial waiting is caused by the modem trying to connect to LTE.
This commit sets the initial system selection to UMTS, and then allows selecting
LTE (if not locked). In the transition from WCDMA to LTE the modem loses
service, so AUTOCONNECT must be used.
Merge branch 'master' of github.com:kristrev/qmi-dialer
Merge branch 'optimise-connect'