[Bug 1936303] [NEW] [SRU] Debounce multiple rfkill events

[Launchpad Bug Tracker]

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[Impact]
Some laptops can generate multiple rfkill events from a single key press.

[Fix]
Commit f4dbcf3d7b0f951fe44b29229206c97b625dbfda ("media-keys: Add one second delay between each rfkill event").
The commit adds a delay between each rkfill events to only process the first event and debounce the later ones.

[Test]
On HP ZBook G7, use `libinput debug-events` to observe there are two rfkill events on single key press. Airplane mode will be enabled and disabled in a very short period, so the airplane mode cannot be turned off by the hotkey anymore.

After applying the fix, pressing airplane mode hotkey can enable or
disable airplane mode correctly.

[Where problems could occur]
Since the delay is hardcoded as 1 second, the airplane mode cannot be switched on/of in a very short time anymore.

** Affects: oem-priority
     Importance: Critical
     Assignee: Andy Chi (andch)
         Status: New

** Affects: gnome-settings-daemon (Ubuntu)
     Importance: Medium
         Status: Confirmed

** Affects: gnome-settings-daemon (Ubuntu Focal)
     Importance: Medium
         Status: Confirmed

** Affects: gnome-settings-daemon (Ubuntu Hirsute)
     Importance: Medium
         Status: Confirmed

** Affects: gnome-settings-daemon (Ubuntu Impish)
     Importance: Medium
         Status: Confirmed


** Tags: oem-priority originate-from-1929039 patch stella
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[SRU] Debounce multiple rfkill events 
https://bugs.launchpad.net/bugs/1936303
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