Adding hidden TM calls to scan/select cell networks.

TM.getCellNetworkScanResults: Performs a radio scan for networks and returns
a list of OperatorInfo.

Tm.setNetworkSelectionModeManual: Manually selects a network and returns the
status of the selection.

Bug: 21563489
Change-Id: If64f30d6f1ed373c1d90433688389307f3dfee8c
5 files changed