Expose Setting.Config APIs

As part of moving DeviceConfig.java to packages/modules/ConfigInfrastructure.
Need to expose setting.config hidden apis to be able to access it
ConfigInfrastructure module.

Test: atest CtsProviderTestCases:android.provider.cts.settings.Settings_ConfigTest
Bug: 258220607
Change-Id: Ia9935e6b4a9b42841f1ece69c0f4ec230e56bd99
8 files changed