Improve OpenAfterOpen VTS test

A callback should be executed every time the NFC interface is opened,
even in OpenAfterOpen scenarios. If a callback is not executed, a
crash may occur where the NfcService hangs while waiting for an
OPEN_CPLT event.

Change-Id: Idd78c0dae944e3d39a6828b43db5a608adbaf1d9
Signed-off-by: Bruno Carneiro <bccunha@motorola.com>