Only apply schedTune boost to top-app tasks

When using EAS, the foreground tasks were all getting boosted
during touchboosts. Limit it to top-app tasks.


BUG: 28378389
Change-Id: I72b7158a614bfd9b6c61024774e408ceba61fc9c
diff --git a/rootdir/init.zygote64.rc b/rootdir/init.zygote64.rc
index 297468c..2cc0966 100644
--- a/rootdir/init.zygote64.rc
+++ b/rootdir/init.zygote64.rc
@@ -7,4 +7,4 @@
     onrestart restart cameraserver
     onrestart restart media
     onrestart restart netd
-    writepid /dev/cpuset/foreground/tasks /dev/stune/foreground/tasks
+    writepid /dev/cpuset/foreground/tasks