add MVNO field for APN Editor

For MVNO, add related data fields.

Bug: 8143480
Change-Id: Idfa06c6f39a2c15ff4f0815724823f44b76ac819
pre-provide the mvno data of the edited apn

For mvno, user can add or edit mvno data field.
Pre-provide the mvno data of the edited apn when the user selects
one of the mvno types.
For example if user choose gid, populate the data field with the
current sim's gid1 data, or if user choose the SPN option, fill
in data with the current carrier string. If IMSI, fill in imsi data.

Change-Id: I1bc280054cc7cd37e78a279866cefd62872a19fb
Merge changes I1bc28005,Idfa06c6f into jb-mr2

* changes:
  pre-provide the mvno data of the edited apn
  add MVNO field for APN Editor