wpa_supplicant: Add 'SCAN TYPE=ONLY' functionality

Usual manual scan request may cause reassociation due to several reasons.
New command is intended to perform pure scan.

Change-Id: I5f517a9f50f286482290e76ca1088abf6a1aeff9
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
5 files changed