Temporary workaround for issue 4604090

There was a regression caused by a change in Honeycomb that removed
mediaserver process from system group to improve security: This prevents
the audio HAL (which runs in mediaserver process) from taking wake locks
while audio is playing thus causing the pcm stream to get unexpectedly
suspended.

This temporary workaround is just to allow ICS dogfood in better conditions until
a real fix taking into account the security issue is implemented.

Change-Id: Ic19a23da4b4383559188b6f5c3a82604c3d95d74
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 42f049a..a2d9f18 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -439,7 +439,8 @@
 service media /system/bin/mediaserver
     class main
     user media
-    group audio camera inet net_bt net_bt_admin
+    # STOPSHIP: remove system from mediaserver groups
+    group audio camera inet net_bt net_bt_admin system
     ioprio rt 4
 
 service bootanim /system/bin/bootanimation