Add a basic cli interface for pn532

Bug: none
Test: none
Flag: EXEMPT:test only
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:5b80788f64db5c8a4c79a255cb2c9d91e8a4f9b7)
Merged-In: I29f5d84e6fe7ee89db9592d4dddd9d1577242694
Change-Id: I29f5d84e6fe7ee89db9592d4dddd9d1577242694
1 file changed