1. Modify the type from boolean to void for updateAvailableNetworks(). 2. Adding callback for updateAvailableNetworks(). 3. Define error codes for update available networks results. Test: build pass Bug: 124616182 Merged-In: I32fe1407deabe36485227ec75931bec334d85abe Change-Id: I32fe1407deabe36485227ec75931bec334d85abe