aml_commonlib: Add to get the ssid and password of the connected wifi [1/1]

PD#SWPL-161035

Problem:
Missing interface and implementation to get ssid and password

Solution:
Get current ssid from wpa status and password from /etc/wpa_supplicant.conf

Verify:
a113l2

Change-Id: Ifaf354733892c1bcdeb659eb302226c771089c59
Signed-off-by: yifan.li <yifan.li@amlogic.com>
4 files changed