[Android] Add NFC to permission mapping table.

By this, user can use make_apk.py to package their application
with NFC extension with correct permission, for example:
$ python make_apk.py --name=apkname --package=org.xwalk.example
  --permissions=nfc --extensions=...

BUG=XWALK-2728
Merge pull request #2507 from wuhengzhi/add_nfc_permission

[Android] Add NFC to permission mapping table.