Move system services into correct cpusets.

To foreground:
- cameraserver
- mediaserver
- audioserver
- mediacodec
- drmserver
- mediadrmserver
- mediaextractor

Bug: 24949295
Change-Id: I182e5cf6fa4b33d87a0a2f77b0b03fa8d76b8e27
diff --git a/services/mediadrm/mediadrmserver.rc b/services/mediadrm/mediadrmserver.rc
index 374d24b..359c2cf 100644
--- a/services/mediadrm/mediadrmserver.rc
+++ b/services/mediadrm/mediadrmserver.rc
@@ -3,3 +3,4 @@
     user media
     group mediadrm drmrpc
     ioprio rt 4
+    writepid /dev/cpuset/foreground/tasks