Update wifi state when DeviceDetected is received

Update wifi state when DeviceDetected is received

Net-config assumes that when DeviceChanged signal is received,
wifi is enabled.
However, there are cases where wifi is already enabled at the time
DeviceDetected signal is received due to IPC communication delay
during net-config initialization.
In this case, an issue may occur because the state assumed by
net-config does not match the actual state.
Therefore, it has been modified to match the actual state by updating
the entire state even when the DeviceDetected signal is received.

Change-Id: I1bafee94b8940e9d477998495b6096a1b34304b1
Signed-off-by: Jaehyun Kim <jeik01.kim@samsung.com>