Regexes weren't matching empty strings (which are perfectly valid) for
the various arguments in the ranges. Fix it so that they do match.
Bug: 119675160
Test: GTS
Change-Id: I4ea0f65b62af9fd35612e5261e01b2bea07c8ddc
Add the PhoneNumberRange and NumberVerificationCallback classes. Add a
method in TelephonyManager to activate the API, but it does nothing for
now.
Bug: 119675160
Test: todo
Change-Id: I3ccd62b47f02a3aa324b675fdb16c8e7a1e9feec