atrace.rc: Move tracefs permissions to late-init

init needs to be the first process to touch /sys/kernel/debug/tracing,
so let's enforce that by moving these chmod's earlier.

tracefs is an automounting filesystem, so the first consumer needs to
have permissions to do the mount.

Bug: 78460200
Change-Id: I15ff0be2ca046d44f8b3ad4abf845cf14c1bad23