config: Add vendor/qcom/opensource/commonsys/system/bt/main to soong ns

Add one more product soong namespace to reflect S(QSSI 12) changes

Change-Id: I84580b04fd34bad35435753f917694a4dd1cc3b9
diff --git a/config/BoardConfigQcom.mk b/config/BoardConfigQcom.mk
index db56fd5..38b8bc6 100644
--- a/config/BoardConfigQcom.mk
+++ b/config/BoardConfigQcom.mk
@@ -160,5 +160,6 @@
 ifeq ($(TARGET_USE_QTI_BT_STACK),true)
 PRODUCT_SOONG_NAMESPACES += \
     vendor/qcom/opensource/commonsys/packages/apps/Bluetooth \
-    vendor/qcom/opensource/commonsys/system/bt/conf
+    vendor/qcom/opensource/commonsys/system/bt/conf \
+    vendor/qcom/opensource/commonsys/system/bt/main
 endif #TARGET_USE_QTI_BT_STACK