Remove selinux denial

Don't audit directory writes to sysfs since they cannot succees
and therefore cannot be a security issue

Bug: 35303861
Test: Make sure denial is no longer shown
Change-Id: I1f31d35aa01e28e3eb7371b1a75fc4090ea40464

private/init.te

@@ -17,3 +17,8 @@ domain_trans(init, init_exec, watchdogd)
 userdebug_or_eng(`
   domain_auto_trans(init, logcat_exec, logpersist)
 ')
+
+# Creating files on sysfs is impossible so this isn't a threat
+# Sometimes we have to write to non-existent files to avoid conditional
+# init behavior. See b/35303861 for an example.
+dontaudit init sysfs:dir write;