[DPP] Replace HAL interface onSuccess with onSuccessConfigSent

Following ANAPIC Review:
onSuccess callback was returning only a single status code, CONFIGURATION_SENT.
Renamed the callback to onSuccessConfigSent and eliminated the status code.

Bug: 124459312
Test: atest DppManagerTest
Test: atest SupplicantStaIfaceHalTest
Test: act.py -c ../WifiDppConfig.json -tc WifiDppTest
Test: vts-tradefed run commandAndExit vts --skip-all-system-status-check --primary-abi-only --skip-preconditions --module VtsHalWifiSupplicantV1_2Host
Change-Id: I4d7c5732ded55902b1f235d40d3babe3be372bf7