Avoid vendor BT stack compilation in pure AOSP

Avoid vendor BT stack compilation in pure AOSP

CRs-Fixed: 2949459
Change-Id: Ifb2cbcc6e0abc23d988720d8dca100beccf2a83e
diff --git a/bt-system-opensource-product.mk b/bt-system-opensource-product.mk
index 2322cb0..db9fb60 100644
--- a/bt-system-opensource-product.mk
+++ b/bt-system-opensource-product.mk
@@ -38,6 +38,7 @@
 
 PRODUCT_SOONG_NAMESPACES += vendor/qcom/opensource/commonsys/packages/apps/Bluetooth
 PRODUCT_SOONG_NAMESPACES += vendor/qcom/opensource/commonsys/system/bt/conf
+PRODUCT_SOONG_NAMESPACES += vendor/qcom/opensource/commonsys/system/bt/main
 
 PRODUCT_PACKAGE_OVERLAYS += vendor/qcom/opensource/commonsys-intf/bluetooth/overlay/qva
 BOARD_BLUETOOTH_BDROID_BUILDCFG_INCLUDE_DIR := vendor/qcom/opensource/commonsys-intf/bluetooth/build/qva/config