LE: Add is_connected() function (2/3)

Change-Id: I73c4ea7f13982bf9c208996f9c749d2dfbe698be
diff --git a/bta/include/bta_api.h b/bta/include/bta_api.h
index 0b7d960..1035bac 100644
--- a/bta/include/bta_api.h
+++ b/bta/include/bta_api.h
@@ -1724,6 +1724,17 @@
 *******************************************************************************/
 BTA_API extern BOOLEAN BTA_DmUseSsr( BD_ADDR bd_addr );
 
+/*******************************************************************************
+**
+** Function         BTA_DmGetConnectionState
+**
+** Description      Returns whether the remote device is currently connected.
+**
+** Returns          0 if the device is NOT connected.
+**
+*******************************************************************************/
+BTA_API extern UINT16 BTA_DmGetConnectionState( BD_ADDR bd_addr );
+
 
 /*******************************************************************************
 **