Add reference to TelephonyManager, renaming, remove checkbox (2/2)

Incorporating API calls to TelephonyManager.getSubscriptions.
Added new SubscriptionManager class to wrap data about subscriptions for
the purpose of passing between Dialer and its fragments.
* This particular CL deals with the introductoin of the
* SubscriptionManager class and the implementation of the dialog.

Bug: 15473965
Change-Id: I8c3a1f34e41bb8b39b5bfae43b6bad1792ed72e5
4 files changed