CHROMIUM: Bluetooth: Add sysfs entry to enable suspend notifier

Place suspend notifier behind sysfs entry. This is necessary so we can
use Finch to control when it is enabled.

BUG=b:147589228
TEST=Run with value as enabled and disabled and verify suspend notifier
     runs accordingly with debug logs.

Change-Id: Ic9020d6973d17190949965bf403daab5c6ff2fae
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2024671
Reviewed-by: Shyh-In Hwang <josephsih@chromium.org>
(cherry picked from commit ae33d131a13e2f29bf44fa2e81914008992d62ea)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2069099
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
3 files changed