SAP: Make it possible to enforce a 16-digit pin code (2/5)

This change enable the posibility to enforce using a
16-digit pin or MITM for a RFCOMM or L2CAP connection.

This is needed for the SIM access profile.

Change-Id: I4d43eefa76e8abc1bcfad6dfd9004d8e82168bf4
Signed-off-by: Casper Bonde <c.bonde@samsung.com>
diff --git a/include/hardware/bt_sock.h b/include/hardware/bt_sock.h
index 69775e0..5d206d7 100644
--- a/include/hardware/bt_sock.h
+++ b/include/hardware/bt_sock.h
@@ -22,6 +22,7 @@
 #define BTSOCK_FLAG_AUTH (1 << 1)
 #define BTSOCK_FLAG_NO_SDP (1 << 2)
 #define BTSOCK_FLAG_AUTH_MITM (1 << 3)
+#define BTSOCK_FLAG_AUTH_16_DIGIT (1 << 4)
 
 typedef enum {
     BTSOCK_RFCOMM = 1,