mediacodec: allow getpid syscall

Bug: 27530325
Change-Id: I8f7fcdf39f56aa812e9b03d91decd750d3846759
diff --git a/seccomp/mediacodec-seccomp.policy b/seccomp/mediacodec-seccomp.policy
index e5e0128..177b461 100644
--- a/seccomp/mediacodec-seccomp.policy
+++ b/seccomp/mediacodec-seccomp.policy
@@ -4,3 +4,4 @@
 geteuid32: 1
 getgid32: 1
 getegid32: 1
+getpid: 1