Update NFC samples.

o Remove NFCDemo sample app. It's janky and is mostly parsing code
  that isn't needed anymore.
o Use new NDEF APIs for parsing and creating records
o Use nicer setNdefPushMessage() API
o Delete helper NDEF code that is not needed any more
o Use URL instead of Text for the foreground push demo
o Mark AndroidBeamDemo a test so it gets installed in data not system

Change-Id: I75eda84019c2075956688e26f2598f126d5659a2
diff --git a/samples/AndroidBeamDemo/Android.mk b/samples/AndroidBeamDemo/Android.mk
index f125f0f..b5f45e8 100644
--- a/samples/AndroidBeamDemo/Android.mk
+++ b/samples/AndroidBeamDemo/Android.mk
@@ -1,7 +1,7 @@
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
-LOCAL_MODULE_TAGS := samples
+LOCAL_MODULE_TAGS := samples tests
 
 # Only compile source java files in this apk.
 LOCAL_SRC_FILES := $(call all-java-files-under, src)