Declare private_platform_apis to build on P
diff --git a/NavBar/Android.mk b/NavBar/Android.mk
index d5142b4..4e8a116 100644
--- a/NavBar/Android.mk
+++ b/NavBar/Android.mk
@@ -2,4 +2,5 @@
 include $(CLEAR_VARS)
 LOCAL_MODULE_TAGS := optional
 LOCAL_PACKAGE_NAME := treble-overlay-NavBar
+LOCAL_PRIVATE_PLATFORM_APIS := true
 include $(BUILD_PACKAGE)