Allow zygote to read storage properties

Bug: 151316657
Test: Able to boot without warnings
Change-Id: If53e472b560d5cf73c145d668bc462ca6881fe4e
diff --git a/private/zygote.te b/private/zygote.te
index 07154b0..4ae427d 100644
--- a/private/zygote.te
+++ b/private/zygote.te
@@ -172,6 +172,9 @@
 
 allow zygote same_process_hal_file:file { execute read open getattr map };
 
+# Allow the zygote to access storage properties to check if sdcardfs is enabled.
+get_prop(zygote, storage_config_prop);
+
 # Let the zygote access overlays so it can initialize the AssetManager.
 get_prop(zygote, overlay_prop)
 get_prop(zygote, exported_overlay_prop)