Force the mediaserver process to restart whenever the zygote or system

server do.

Change-Id: I16ce4ae656473055e7e244ccd4af7055959e3c1c

rootdir/init.rc

@@ -276,6 +276,7 @@ service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-sys
     socket zygote stream 666
     onrestart write /sys/android_power/request_state wake
     onrestart write /sys/power/state on
+    onrestart restart media
 
 service media /system/bin/mediaserver
     user media