NFC: Make polling mode switchable (2/3)

This is not the cleanest solution, I know. Help me make it cleaner!

Change-Id: Ib3ccf908c579ff7eb603a211440d9d341eda69ab
Merge git://github.com/finnqBuilds/android_packages_apps_Nfc
remove NFC on Lockscreen

Change-Id: I42eea3c4c3b423b024e30d5da8090e0670316f43
change NFC POLLING_MODE to SCREEN_STATE_ON_LOCKED

Change-Id: I5d111d29b299427629ed8e1b25eea31b9f713f45
remove finnqs changes for switchable NFC polling

Change-Id: I452a4aba24dcee2195a40a538d844b5b0fe0e6b1
merge changes from remotes/github/cm-10.1 into master