[rilmodem] Actually remove delayed register timer in ril_call_barring_remove
[rilmodem] Remove delayed register timer in ril_oemraw_remove
[RILMODEM] fix cf query callback list handling

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>
Merge pull request #205 from monich/ril_oemraw_delayed_register

[rilmodem] Remove delayed register timer in ril_oemraw_remove
Merge pull request #204 from monich/ril_delayed_register

[rilmodem] Actually remove delayed register timer
Merge pull request #209 from jpoutiai/next

[RILMODEM] fix cf query callback list handling
Merge pull request #210 from nemomobile-packages/next

Merge various improvements from 'next' to 'master'
[voicecall] Inform client when local ringback tone is needed

In some networks, MO calls do not get the "alerting" tone in-band, so the device needs to play one locally.

This commit adds a "voice call agent" API. It currently contains only the ringback tone notification, but can be extended later.