aidl: ISehRadioNetworkIndication: Add missing function

aidl: ISehRadioNetworkIndication: Add missing function

* Without this all the transaction IDs after this function are shifted by one
* When libril_sem tries to call vendorConfigurationChanged() which is the last
  function in the interface, previously the AIDL lib would not have any transaction
  matching it, causing it to call the very last function (getInterfaceVersion)
  which, due to different parameters, causes a segmentation fault

Change-Id: Ic6e9b740313d96c0c645fc54a0804d348892718a