Replace writepid with task_profiles command for cgroup migration

writepid command usage to join a cgroup has been deprecated in favor
of a more flexible approach using task_profiles. This way cgroup path
is not hardcoded and cgroup changes can be easily made. Replace
writepid with task_profiles command to migrate between cgroups.

Bug: 191283136
Test: build and boot
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I9e89fc0f3dc1b4e970cf3a5982ed7f177d2c392c
diff --git a/vold.rc b/vold.rc
index 93d8786..0252c2f 100644
--- a/vold.rc
+++ b/vold.rc
@@ -3,6 +3,6 @@
         --fsck_context=u:r:fsck:s0 --fsck_untrusted_context=u:r:fsck_untrusted:s0
     class core
     ioprio be 2
-    writepid /dev/cpuset/foreground/tasks
+    task_profiles ProcessCapacityHigh
     shutdown critical
     group root reserved_disk