SystemUI: avoid NPE when no toggles are set

Change-Id: Idc3fe5b43f545fed51f33b06fb5888fb5e226b7a
Signed-off-by: Roman Birg <romanbirg@gmail.com>
SystemUI: set correct initial NFC toggle state

Change-Id: I451f53bb2ae533823c214a66d83ce6a92ceb5025
Signed-off-by: Roman Birg <romanbirg@gmail.com>