atrace.rc: tracing should be disabled by default.

Bug: 26217098
Change-Id: I6066c433d19c2d1c220669a9a78f5085af8c1d4b
diff --git a/cmds/atrace/atrace.rc b/cmds/atrace/atrace.rc
index 3373192..74c8d43 100644
--- a/cmds/atrace/atrace.rc
+++ b/cmds/atrace/atrace.rc
@@ -51,6 +51,9 @@
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_locked/enable
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_unlock/enable
 
+    # Tracing disabled by default
+    write /sys/kernel/debug/tracing/tracing_on 0
+
 # Allow only the shell group to read and truncate the kernel trace.
     chown root shell /sys/kernel/debug/tracing/trace
     chmod 0660 /sys/kernel/debug/tracing/trace