TeleService: For Msim DSDS, set mode to 2g(all sims) prior to change

* DSDS have a wierd behavior that all sims need to be toggle to 2g before switching
to 3g or above.

Change-Id: Iccd409ea0811a2a041d0e707da6285ed5d3375cd
Telephony: bugfix - let us edit 'My phone number' again

http://review.cyanogenmod.org/#/c/75688/3 introduced a change on "My Phone
Number", having the option disabled at the beginning, so it can only be used
after it has been init'd.
This commit now enables the option, when init is done.

Change-Id: I50438ac5231934b9c28d7161c05438ab4519aa8b
Merge remote-tracking branch 'cm/cm-11.0' into kitkat