Suppress a denial on VM boot

The denial is correct, but is causing test failures. However it
appears to be harmless and VMs are operating just fine.

Suppress it until the correct policy is ready.

Bug: 306516077
Test: atest MicrodroidHostTests
Change-Id: I5d8545add4927c2521c3d4e9dc2b5bedb91c0f45
diff --git a/microdroid/system/private/init.te b/microdroid/system/private/init.te
index f4541a3..2dbf495 100644
--- a/microdroid/system/private/init.te
+++ b/microdroid/system/private/init.te
@@ -435,3 +435,7 @@
 
 # PRNG seeder daemon socket is created and listened on by init before forking.
 allow init prng_seeder:unix_stream_socket { create bind listen };
+
+# Workaround for test failures (b/306516077)
+# We get a denial for this on VM boot, but the denial is correct.
+dontaudit init device:file relabelto;