[3/3] Settings: Add NFC polling setting

Change-Id: I1f715d9ab6b77cf4903e2bf5ef8310471c178309

Conflicts:
	res/values/custom_arrays.xml
	res/values/custom_strings.xml
Revert "Derp"

This reverts commit 5cf8817214bf04a1fcd0cd9244661a83d597f4ec.
Revert "Add missing bracket ")""

This reverts commit eefa7768cf402c5dae23d503fa06f423282390ee.
Revert "Clean up lock screen interface code"

This reverts commit 04ed243135d5754206a017a121ca3b971e46620a.