A2DP-related renaming: a2d_* to a2dp_*

Test: top-level compilation and running A2DP

Change-Id: Ibbd3176b86667885666bfe29025ec2c120fafce6
diff --git a/main/bte_init.c b/main/bte_init.c
index a83667e..d45a0d4 100644
--- a/main/bte_init.c
+++ b/main/bte_init.c
@@ -46,7 +46,7 @@
 #include "avrc_api.h"
 
 #if (A2D_INCLUDED == TRUE)
-#include "a2d_api.h"
+#include "a2dp_api.h"
 #endif
 
 #if (HID_HOST_INCLUDED == TRUE)
@@ -104,7 +104,7 @@
 ** AVDT and its profiles **
 ***************************/
 #if (A2D_INCLUDED == TRUE)
-    A2D_Init();
+    A2DP_Init();
 #endif  /* AADP */