Support abortScan

Support to abortScan instead of "ABORT_SCAN" command of
wpa_supplicant.
When STA scan triggered by wificond is ongoing, abortScan sends
NL80211_CMD_ABORT_SCAN to kernel to stop it.

Bug: 37227357
BUg: 37743832
Test: Manual test
Change-Id: I542088e7711bd7e32a22685397af8e7f3a8ccdf7
5 files changed