qssi: add public libs whitelisting txt for system_ext.

To allow libs access for 3rd party, add public libs whitelist txt
to export libs from system_ext.

Change-Id: Idd01ca7a8d4f174e732ee0f8e755cc75df64f75f
CRs-Fixed: 2696885
diff --git a/qssi.mk b/qssi.mk
index 7ab2900..09ffafa 100644
--- a/qssi.mk
+++ b/qssi.mk
@@ -221,6 +221,10 @@
 PRODUCT_COPY_FILES += \
     device/qcom/qssi/public.libraries.product-qti.txt:$(TARGET_COPY_OUT_PRODUCT)/etc/public.libraries-qti.txt
 
+# copy system_ext specific whitelisted libraries to system_ext/etc
+PRODUCT_COPY_FILES += \
+    device/qcom/qssi/public.libraries.system_ext-qti.txt:$(TARGET_COPY_OUT_SYSTEM_EXT)/etc/public.libraries-qti.txt
+
 #Enable full treble flag
 PRODUCT_FULL_TREBLE_OVERRIDE := true
 PRODUCT_VENDOR_MOVE_ENABLED := true