Telephony(MSIM): Disable DDS Switch in Airplane Mode.

Do not allow user to change the DDS in Airplane Mode
as modem will be in LPM state.

Change-Id: I21ceaa53df6f0acd7be5fb8f23a120f92023a152
CRs-Fixed: 594616
Merge "Telephony(MSIM): Disable DDS Switch in Airplane Mode." into cm-11.0
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0-sgt7