foreground-service: Remove visibility change listener beforeDestroy

[florian-h05]

... and check for foreground before starting foreground activity.

Follow-up for #1878.

[florian-h05]

@ghys This is a hotfix for my PR from yesterday, I forgot to remove the event listener beforeDestroy. Can you please have a look at this soon? Thanks!

[relativeci]

Job #978: Bundle Size — 15.76MiB (+0.61%).

45b57d6(current) vs 2f7bd09 main#977(baseline)

⚠️ Bundle contains 16 duplicate packages

Metrics (5 changes)

	Current Job #978	Baseline Job #977
Initial JS	1.73MiB(+4.25%)	1.66MiB
Initial CSS	608.89KiB	608.89KiB
Cache Invalidation	93.91%	93.95%
Chunks	219	219
Assets	689	689
Modules	1719(+1.66%)	1691
Duplicate Modules	85(-2.3%)	87
Duplicate Code	1.73%(-1.7%)	1.76%
Packages	138	138
Duplicate Packages	15	15

Total size by type (2 changes)

	Current Job #978	Baseline Job #977
CSS	858.62KiB	858.62KiB
Fonts	526.1KiB	526.1KiB
HTML	1.23KiB	1.23KiB
IMG	140.74KiB	140.74KiB
JS	9.25MiB (+0.68%)	9.19MiB
Media	295.6KiB	295.6KiB
Other	4.73MiB (+0.7%)	4.7MiB

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View job #978 report View main branch activity

[ghys]

Thank you Florian!