Further increase NFC transaction timeout

Several users have reported that their YubiKeys hit the two second timeout when used via NFC. Per specification, this shouldn't be possible, it just seems that some NEOs are buggy. Increase the timeout to ten seconds to make these NEOs work.

Fixes #5

app/src/main/java/net/pp3345/ykdroid/yubikey/NfcYubiKey.java

@@ -40,7 +40,7 @@ public NfcYubiKey(final IsoDep tag) {
 	private void ensureConnected() throws IOException {
 		if (!this.tag.isConnected()) {
 			this.tag.connect();
-			this.tag.setTimeout(2000);
+			this.tag.setTimeout(10000);
 		}
 	}