Enable WRITE_SMS for telephony provider

WRITE_SMS app op is explicitly granted to some system components
like bluetooh, phone, mms service. It is however no granted to the
telephony provider. The latter is the one storing the SMS data and
should always have the app op enabled. Content providers perform
proxy app op updates (taking a note they perform an operation on
behalf of another app) which requires the proxy package, the provider,
to have the app op allowed.

bug:23017449

Change-Id: Ic0c6865a616b6f3997a64d390699e9fd86c4ae2e