Add hours of operation info to incall business context.

Display hours of operation information if it is available. If hours of
operation are available, also determine whether it is currently open or
closed. Display in the InCallUI when making a business call.
Also add tests to make sure that the business context object is
constructed correctly.

Bug: 23351559

Change-Id: Ic2846e54e15ade37ccf0b916651cc3388da3cc23