RIL: mark mInstanceId as protected

To use in RIL subclasses

Change-Id: I4ab1ea79079e3b03670b1e985f7a574df1f16658
telephony: MSim: propagate roaming and data settings to SIM

Update SIM-specific setting when global setting is set by API
rather than the MSim configuration dialog. (e.g. QuickSettings)

Change-Id: I1ea4aad02055be6bcc9132d6d91a65826b6765b2