SystemUI: Fix data and activity overlay icons

This is just a temporary fix.
Better solution will be to use new vector format of drawables.

Change-Id: I2f27e5cedefefbf542fa9871d6dc125cb1420439
Signed-off-by: kecinzer <kecinzer@gmail.com>
SystemUI: Fix mobile data connection type hiding

* Hide mobile data connection type when WiFi is connected.

Change-Id: Id346bc0040436f2bfc7219445d0a3ba8000eea3b