Create libnfcutils static library and add native tests

First commit to establish native unit test framework and break out
independent modules into shared libraries to allow inclusing into unit
test binaries.

Test: nfc_test_utils ;)
Change-Id: I1e90a50d83e6214da64ff8193af730b473aa4a6a
diff --git a/src/Android.bp b/src/Android.bp
index 19725dc..a5f613a 100644
--- a/src/Android.bp
+++ b/src/Android.bp
@@ -23,6 +23,9 @@
         "libutils",
         "android.hardware.nfc@1.0",
     ],
+    static_libs: [
+        "libnfcutils",
+    ],
     cflags: [
         "-DBUILDCFG=1",
         "-Wall",