screenrecord: Fix mediacodec selinux and seccomp policy denials

Fix mediacodec selinux and seccomp denials for
screenrecord to work.

mediacodec need gpu access, plus it also crashes
with following seccomp error during screenrecord:

E android.hardware.media.omx@1.0-service: libminijail[488]: blocked syscall: sysinfo

So allow sysinfo syscall for mediacodec by
re-using the same seccomp_policy which we use for
mediaswcodec (aosp/1238348).

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Change-Id: I62fd7ef159c520a26be83cd57ec72e1d51adfa52
diff --git a/device-common.mk b/device-common.mk
index 88d4221..918bed0 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -139,6 +139,7 @@
     frameworks/av/media/libstagefright/data/media_codecs_google_audio.xml:$(TARGET_COPY_OUT_VENDOR)/etc/media_codecs_google_audio.xml
 
 PRODUCT_COPY_FILES += \
+    $(LOCAL_PATH)/seccomp_policy/mediaswcodec.policy:$(TARGET_COPY_OUT_VENDOR)/etc/seccomp_policy/mediacodec.policy \
     $(LOCAL_PATH)/seccomp_policy/mediaswcodec.policy:$(TARGET_COPY_OUT_VENDOR)/etc/seccomp_policy/mediaswcodec.policy
 
 # Copy hardware config file(s)
diff --git a/sepolicy/mediacodec.te b/sepolicy/mediacodec.te
new file mode 100644
index 0000000..6119c90
--- /dev/null
+++ b/sepolicy/mediacodec.te
@@ -0,0 +1 @@
+gpu_access(mediacodec)