mediacodec: allow fstatat64 syscall

Bug: 27530325
Change-Id: I8db30ff8a319e40b93f9b145808932868d99493b
diff --git a/services/mediacodec/minijail/seccomp_policy/mediacodec-seccomp-arm.policy b/services/mediacodec/minijail/seccomp_policy/mediacodec-seccomp-arm.policy
index 75fb9c8..4be96d5 100644
--- a/services/mediacodec/minijail/seccomp_policy/mediacodec-seccomp-arm.policy
+++ b/services/mediacodec/minijail/seccomp_policy/mediacodec-seccomp-arm.policy
@@ -39,6 +39,7 @@
 sched_get_priority_min: 1
 statfs64: 1
 sched_setscheduler: 1
+fstatat64: 1
 
 # for attaching to debuggerd on process crash
 sigaction: 1