Add selinux permissions for ro.usb.uvc.enabled

This CL the selinux rules for the property ro.usb.uvc.enabled which will
be used to toggle UVC Gadget functionality on the Android Device.

Bug: 242344221
Bug: 242344229
Test: Manually tested that the property can only be read at runtime,
      not written to.
Change-Id: I0fd6051666d9554037acc68fa81226503f514a45
diff --git a/private/property.te b/private/property.te
index c4351d1..5383300 100644
--- a/private/property.te
+++ b/private/property.te
@@ -681,3 +681,9 @@
   domain
   -init
 } log_file_logger_prop:property_service set;
+
+neverallow {
+  domain
+  -init
+  -vendor_init
+} usb_uvc_enabled_prop:property_service set;