mediacodec violates "no Binder in vendor" rule

This adds mediacodec to the list of temporary exemptions from the "no
Binder in vendor" rule.

Test: mmm system/sepolicy
Bug: 35870313
Change-Id: I0f00d4bfb90d6da45ae2fed65864bb8fb0a4e78e

public/mediacodec.te

@@ -13,6 +13,8 @@ binder_call(mediacodec, binderservicedomain)
 binder_call(mediacodec, appdomain)
 binder_service(mediacodec)
 
+# TODO(b/36604251): Remove this once OMX HAL stops using Binder
+typeattribute mediacodec binder_in_vendor_violators;
 add_service(mediacodec, mediacodec_service)
 allow mediacodec mediametrics_service:service_manager find;
 allow mediacodec surfaceflinger_service:service_manager find;

vendor/hal_omx.te

-typeattribute mediacodec coredomain;
-
 init_daemon_domain(mediacodec)