0.1.2

Fixed

• Android HCE now claims routing while the app is in the foreground
  (MOB-300). emulate_ndef/3 calls
  CardEmulation.setPreferredService for io.mob.nfc.MobNfcApduService
  while the host activity is resumed, and unsetPreferredService on
  stop_emulation/1 and when the activity pauses (re-claimed on resume if
  still emulating). Previously any other installed app registering the NDEF
  AID D2760000850101 competed for routing, so a reader tap could land in
  Android's AID-conflict chooser. Skipped on devices without NFC/HCE; the
  claim/release results are logged under the MobNfc logcat tag.