[TIMOB-28477] Android: Update "ti.nfc" module for Android 12

*Summary:* We need to update this module to address Android 12's breaking-changes. https://developer.android.com/about/versions/12/behavior-changes-12#exported https://developer.android.com/about/versions/12/behavior-changes-12#pending-intent-mutability *Pending Intent Change:* Pass the [PendingIntent.FLAG_IMMUTABLE](https://developer.android.com/reference/android/app/PendingIntent#FLAG_IMMUTABLE) constant to the PendingIntent.getActivity() method call in [NfcForegroundDispatchFilter.java](https://github.com/appcelerator-modules/ti.nfc/blob/master/android/src/ti/nfc/NfcForegroundDispatchFilter.java) to prevent an exception from being thrown. *Intent-Filter Changes:* Update the <intent-filter/> examples to explicitly set the android:exported attribute. https://github.com/appcelerator-modules/ti.nfc/blob/master/apidoc/Nfc.yml https://github.com/appcelerator-modules/ti.nfc/blob/master/android/example/TagViewer/app/controllers/index.js https://github.com/appcelerator-modules/ti.nfc/blob/master/android/example/TagForeground/app/controllers/index.js https://github.com/appcelerator-modules/ti.nfc/blob/master/android/example/TagWriter/app/controllers/index.js