Density Toggle v5.9.2

Fixes intermittent failure to restore density after leaving YouTube / media playback.

• A watched app's window-teardown event no longer re-arms the launch grace (this could defer the restore indefinitely while a media session was live, e.g. playing to a Bluetooth headset).
• The One UI media-output picker no longer counts as "another app" (this restored density mid-video when playback started).

Verified with an on-device test battery on the Galaxy Watch Ultra: simple leave, leave mid-playback, rapid re-enter/leave, and force-stop all restore within a few seconds.