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