Put mediaserver and audioserver in the foreground stune group.

bug 29512132

Change-Id: Id727977d832bdb291790e603e8a65416b9f0c76a
diff --git a/media/audioserver/audioserver.rc b/media/audioserver/audioserver.rc
index 2409157..fef430b 100644
--- a/media/audioserver/audioserver.rc
+++ b/media/audioserver/audioserver.rc
@@ -5,3 +5,4 @@
     group audio camera drmrpc inet media mediadrm net_bt net_bt_admin net_bw_acct
     ioprio rt 4
     writepid /dev/cpuset/foreground/tasks
+    writepid /dev/stune/foreground/tasks
\ No newline at end of file
diff --git a/media/mediaserver/mediaserver.rc b/media/mediaserver/mediaserver.rc
index b777d5c..faab938 100644
--- a/media/mediaserver/mediaserver.rc
+++ b/media/mediaserver/mediaserver.rc
@@ -4,3 +4,4 @@
     group audio camera inet net_bt net_bt_admin net_bw_acct drmrpc mediadrm
     ioprio rt 4
     writepid /dev/cpuset/foreground/tasks
+    writepid /dev/stune/foreground/tasks