Fix error in RAN conversion in RIL

setNetworkSelectionModeManual should use convertAntToRan (return
RadioAccessNetworks) instead of convertRanToHalRan (returns
AccessNetwork).
RadioAccessSpecifier should also use convertAntToRan since values are
different between frameworks code and HAL.

Test: atest RILTest
Bug: 68116277
Bug: 149528140
Change-Id: Ic93cb16e594d2c48baa0660dd8f9221accf15602