profiling: Set startup system properties.

Add --cleanup-after-crash to clean up leftover system properties.

Test: start profiling and check properties
      check --cleanup-after-crash

Change-Id: Ife9fe45e6b4d700f9c656836f94549eeb942485d
diff --git a/heapprofd.rc b/heapprofd.rc
index eb5379a..5e055b2 100644
--- a/heapprofd.rc
+++ b/heapprofd.rc
@@ -18,4 +18,5 @@
     user nobody
     group nobody readproc
     writepid /dev/cpuset/system-background/tasks
+    onrestart exec_background - nobody shell -- /system/bin/heapprofd --cleanup-after-crash
     capabilities KILL