[PATCH] Do not emit OOM notifications on systemd services reload

[PATCH] Do not emit OOM notifications on systemd services reload

When systemd services are reloaded, systemd emits all PropertiesChanged signals for all units.

Comparing with the original signals these have a null MainPID, so we can use that to identify them and not emit a notification.

BUG: 502279

(cherry picked from commit ce33b24d4f1b5711f7585b33822ab87f2f43af0b)

ce33b24d Do not emit OOM notifications on systemd services reload

Co-authored-by: Antonio Rojas <arojas@archlinux.org>
Gbp-Pq: Name upstream_ec837446_Do-not-emit-OOM-notifications-on-systemd-services-reload.patch