cc bp2build for sysprop_library modules

This CL implements bp2build functionality for the cc outputs of
sysprop_library modules. cc_* modules depending on sysprop sources
will be handled in a later CL.

Bug: 244439349
Test: b build //system/libsysprop/srcs/...
Test: Inspect BUILD.bazel
Test: Unit tests
Change-Id: I6fa20661b984223347480c9afe0885b5db5a2807
diff --git a/android/allowlists/allowlists.go b/android/allowlists/allowlists.go
index 7a62bae..ccd4a77 100644
--- a/android/allowlists/allowlists.go
+++ b/android/allowlists/allowlists.go
@@ -450,6 +450,7 @@
 		"linker_config",
 		"java_import",
 		"java_import_host",
+		"sysprop_library",
 		"aidl_interface_headers",
 	}