eas: Making cameraserver part of foreground stune cgroup

BUG: 28312446
Change-Id: I321fc2882b12f67ca5fd2a9839685343368d3a3f
diff --git a/camera/cameraserver/cameraserver.rc b/camera/cameraserver/cameraserver.rc
index c11a02a..624baff 100644
--- a/camera/cameraserver/cameraserver.rc
+++ b/camera/cameraserver/cameraserver.rc
@@ -4,3 +4,4 @@
     group audio camera input drmrpc inet media mediadrm net_bt net_bt_admin net_bw_acct
     ioprio rt 4
     writepid /dev/cpuset/camera-daemon/tasks
+    writepid /dev/stune/foreground/tasks