Bluetooth: Check A2dp device priority

For incoming connections stack does not check priority
of device.Add support to check priority of device in stack
for incoming connection.

Change-Id: I746e8831f5593afa3c88fa37737599ace77a1e2f
diff --git a/include/hardware/bt_av.h b/include/hardware/bt_av.h
index 5252a17..fb68d07 100644
--- a/include/hardware/bt_av.h
+++ b/include/hardware/bt_av.h
@@ -47,6 +47,11 @@
 typedef void (* btav_audio_state_callback)(btav_audio_state_t state, 
                                                bt_bdaddr_t *bd_addr);
 
+/** Callback for connection priority of device for incoming connection
+ * btav_connection_priority_t
+ */
+typedef void (* btav_connection_priority_callback)(bt_bdaddr_t *bd_addr);
+
 /** Callback for audio configuration change.
  *  Used only for the A2DP sink interface.
  *  state will have one of the values from btav_audio_state_t
@@ -64,6 +69,7 @@
     btav_connection_state_callback  connection_state_cb;
     btav_audio_state_callback audio_state_cb;
     btav_audio_config_callback audio_config_cb;
+    btav_connection_priority_callback connection_priority_cb;
 } btav_callbacks_t;
 
 /** 
@@ -96,6 +102,9 @@
 
     /** Closes the interface. */
     void  (*cleanup)( void );
+
+    /** Send priority of device to stack*/
+    void (*allowConnection)( int is_valid );
 } btav_interface_t;
 
 __END_DECLS