binder: add delivered_freeze to debugfs output

Add the pending proc->delivered_freeze work to the debugfs output. This
information was omitted in the original implementation of the freeze
notification and can be valuable for debugging issues.

Fixes: d579b04a ("binder: frozen notification")
Cc: stable@vger.kernel.org
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Acked-by: Todd Kjos <tkjos@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20240926233632.821189-9-cmllamas@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>