Do not turn on NFC automatically when airplane mode is off.

- besides checking the value for AIRPLANE_MODE_TOGGLEABLE_RADIOS, also
check the value for AIRPLANE_MODE_RADIOS to determine if we should turn
off NFC when airplane mode is on.
- when user turns off airplane mode, only re-enable the NFC preference
and do not enable NFC by default.
- remove listening to airplane mode directly from the android beam
preference controller, as it is already listening to Nfc state, which
handles the beam state already.

Change-Id: Id41fef15fb2de873729d20d7f53b1a88b164cf95
Fixes: 80217047
Test: make RunSettingsRoboTests