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: Ia136fd51d7fd39a0e1988ae3ae1aeb80ab5f3cc5
diff --git a/keystore2/keystore2.rc b/keystore2/keystore2.rc
index 82bf3b8..6f88dd3 100644
--- a/keystore2/keystore2.rc
+++ b/keystore2/keystore2.rc
@@ -10,4 +10,4 @@
     class early_hal
     user keystore
     group keystore readproc log
-    writepid /dev/cpuset/foreground/tasks
+    task_profiles ProcessCapacityHigh