Fix mediacodec on vndk-27

Since android-10.0.0_r37, mediacodec seccomp policy now has two
includes. In AOSP 8.1, minijail is vendor-side.
AOSP 8.1's minijail has a bug, which can't read multiple includes.
All of this together means mediacodec is broken.

This fixes it by overriding vendor's minijail to a working one, in the
hope that vendors didn't change anything in their own minijail

https://issuetracker.google.com/issues/158068181

phh-on-boot.sh

@@ -1,5 +1,8 @@
 #!/system/bin/sh
 
+vndk="$(getprop persist.sys.vndk)"
+[ -z "$vndk" ] && vndk="$(getprop ro.vndk.version |grep -oE '^[0-9]+')"
+
 [ "$(getprop vold.decrypt)" = "trigger_restart_min_framework" ] && exit 0
 
 setprop ctl.start media.swcodec
@@ -31,6 +34,12 @@ fi
 
 setprop ctl.stop storageproxyd
 
+sleep 10
+if [ "$vndk" = 27 ] && getprop init.svc.mediacodec |grep -q restarting;then
+    mount /system/lib64/vndk-27/libminijail.so /vendor/lib64/libminijail_vendor.so
+    mount /system/lib/vndk-27/libminijail.so /vendor/lib/libminijail_vendor.so
+fi
+
 #Clear looping services
 sleep 30
 getprop | \