SystemUI: Fix showing duplicated charging status

In commit 85e5a57 it was possible that plugging a device in,
then turning on the screen would show the charging status twice.
To fix, don't append the charging status to if there is a
transient notification.

Change-Id: Ic031fbaf9a99d044f50dc65e2b189773222ebe80
Signed-off-by: SagarMakhar <sagarmakhar@gmail.com>
1 file changed