Change how TelephonyManager handles subscriptions.

Addressing API council feedback, remove* all subscription ID arguments
from API calls, and provide a factory method to create a new
TelephonyManager which uses a given subId.

* The subId methods will be @hidden instead of deleted.

Bug: 28845064
Change-Id: I2de8ae9e45bc14962c7c20d7d076ec83bce92cd3
4 files changed