NFC polling mode (1/3)

Signed-off-by: sethyx <sethyx@gmail.com>

Conflicts:
	src/com/android/nfc/NfcService.java
NFC: airplane_mode_on moved to global google

Change-Id: Id05757ad7d1180408e8a06e3b6dbaaf2e4f4a756

Conflicts:
	src/com/android/nfc/NfcService.java