Add android.nfc.tech.ndef to unformatted NFC tags

Adds NDEF technology in cases where an empty tag is read. Separates the
case where there was an error while reading the tag (buff is null) and
empty tag was read (buff is non-null but length is zero).

Test: Manual; Read a unformatted NTAG213
Bug: 33036200
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
(cherry picked from commit c69e4283)

Change-Id: I664f9b9dc2b5b6ca103e0f5434f18acb7335a2ae