Define a subset of provisioning integers as public

There are a few non-OMADM specific configs that need to
be exposed in ProvisioningManager to handle cases
like turning on WFC "non-persistently" for provisioning
on certain networks. These should be well defined for
compatibility as well as ease of use.

Test: atest FrameworksTelephonyTests, turn on WFC
Change-Id: I79c9492664d4bf41b10639c0596d4f2697cd46f2