Dialer(MSIM): Dialer app support for multisim

-Call Settings support for multisim.
  Use MSimCallFeaturesSetting class to provide all
  subscription specific Call settings access to user.

-Add support to handle the following commands/request on
 voice preferred subscription for multisim
 1) ADN entry MMI commands.
 2) Voicemail dial request.
 3) PIN/PUK MMI commands.

Change-Id: I9a65978ec9d6b4deba94082e2892030aca620f25