mediacodec-x86.policy: Allow media.omx to call sched_setscheduler/uname on x86 platform

Bug: 4556907
Test: m
Change-Id: If8745a12b329974175d4a89e7e3d72efaff48c14
diff --git a/services/mediacodec/seccomp_policy/mediacodec-x86.policy b/services/mediacodec/seccomp_policy/mediacodec-x86.policy
index bbbe552..821e69f 100644
--- a/services/mediacodec/seccomp_policy/mediacodec-x86.policy
+++ b/services/mediacodec/seccomp_policy/mediacodec-x86.policy
@@ -48,6 +48,8 @@
 set_tid_address: 1
 write: 1
 nanosleep: 1
+sched_setscheduler: 1
+uname: 1
 
 # Required by AddressSanitizer
 gettid: 1