Add missing include of bt_vendor_qcom.h

Bug: 31420007
Change-Id: I9a35333d4e2e66c5e2b9024aa08123d684f65c3e
diff --git a/msmcobalt/libbt-vendor/src/hw_ar3k.c b/msmcobalt/libbt-vendor/src/hw_ar3k.c
index b1d50ab..a5d73e2 100644
--- a/msmcobalt/libbt-vendor/src/hw_ar3k.c
+++ b/msmcobalt/libbt-vendor/src/hw_ar3k.c
@@ -52,6 +52,7 @@
 #include "bt_hci_bdroid.h"
 #include "hci_uart.h"
 #include "hw_ar3k.h"
+#include "bt_vendor_qcom.h"
 
 /******************************************************************************
 **  Variables