Revert "Change ifname to interface handle in set_scan_mode api"

This reverts commit 800da88532429c236cb9a7597688a810c1cbacef.

Reason for revert: Droidmonitor created revert due to build breakage in b/343479152

Change-Id: I666c1f584a6649b1526016e14bc7e8b901eee204
2 files changed