Move OemNetworkPreferences aidl to connectivity

Move the IOnSetOemNetworkPreferenceListener aidl definition to
framework-connectivity.
The interface is an internal implementation detail of
framework-connectivity, so it should be built inside the jar.

Bug: 181512874
Test: m
Change-Id: I898049b50fc620ee629587a9303f058e0a6d0272
1 file changed