elinux: Update access rules for codec process

Add rule to address dir search violation for video_device

bug:27115708
Change-Id: I14bad283af1ddda725e41d0100a09e6066519846
diff --git a/mediacodec.te b/mediacodec.te
index cf2047c..9958f17 100644
--- a/mediacodec.te
+++ b/mediacodec.te
@@ -14,6 +14,7 @@
 allow mediacodec mediacodec_service:service_manager add;
 allow mediacodec gpu_device:chr_file rw_file_perms;
 allow mediacodec video_device:chr_file rw_file_perms;
+allow mediacodec video_device:dir search;
 allow mediacodec ion_device:chr_file r_file_perms;
 
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