Add APIs to get/set if usage of multiple SIMs is restricted.

Add API that indicates if the usage of multiple SIMs at the same time is
allowed or restricted in order to support requirements from carriers for
dual SIM devices.

Bug: 123537730
Test: verified with test application.
Change-Id: I1aa1f53d2889621403b3b52bb7dc2acbbd79a499
Merged-In: I1aa1f53d2889621403b3b52bb7dc2acbbd79a499
(cherry picked from commit cea4cf2dbcd8012c6e64fc46e8c537045105eacc)
1 file changed