soong: Add flag for fod extension

Change-Id: Ib45706cc50fa88b9b05af1c68eec9d1f08d70569
diff --git a/build/soong/android/variable.go b/build/soong/android/variable.go
index 0a03258..04aa4f5 100644
--- a/build/soong/android/variable.go
+++ b/build/soong/android/variable.go
@@ -50,6 +50,10 @@
 	Target_shim_libs struct {
 		Cppflags []string
 	}
+	Target_surfaceflinger_fod_lib struct {
+		Cflags []string
+		Whole_static_libs []string
+	}
 	Uses_generic_camera_parameter_library struct {
 		Srcs []string
 	}
@@ -82,6 +86,7 @@
 	Target_needs_netd_direct_connect_rule  *bool `json:",omitempty"`
 	Target_process_sdk_version_override  *string `json:",omitempty"`
 	Target_shim_libs  *string `json:",omitempty"`
+	Target_surfaceflinger_fod_lib  *string `json:",omitempty"`
 	Uses_generic_camera_parameter_library  *bool `json:",omitempty"`
 	Uses_nvidia_enhancements  *bool `json:",omitempty"`
 	Uses_qcom_bsp_legacy  *bool `json:",omitempty"`