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4G+ RAT icon can not be displayed when back to 4G from 4G+
ServiceState#setIsUsingCarrierAggregation() does not work because it sets current CA status to the copied instance but it does not set to the original data. As a result, System UI cannot be determined correctly whether to display the RAT icon as carrier aggregation or not, the problem occurs. To resolve the problem, apply the copied instance to the original data by using addNetworkRegistrationInfo(). Test: manual - Checked that correct RAT icon is displayed according to rat ratchet behavior. Bug: 141276200 Change-Id: Ic9a26ff932647b09d8770304c3057b572afaf2a4