
If 5G band disabled, all channels of 5G should be disabled, before SAP switch to 2G channels, we need save original 5G channel, or when 5G re-enable, can't restore back to original 5G channel. Regression of change-Id: I679ce6f72228b431530953a631c8c8afa4597187. Change-Id: Iabb932102c37cc7b9d4d97a2e22e781958ed906f CRs-Fixed: 2789341