[Bug Fix] Clear FLAG_SECURE after passcode screen

[parneet-guraya]

Fixes
#4164
#4076

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed
• 🔖 Capability is checked or not needed
• 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/4172-talk.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud Talk app.

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	86	92
Errors	131	131

SpotBugs

Category	Base	New
Bad practice	6	6
Correctness	11	11
Dodgy code	78	78
Internationalization	3	3
Malicious code vulnerability	3	3
Performance	6	6
Security	1	1
Total	108	108

Lint increased!

[mahibi]

i just saw by coincidence the PR #3716 from @sowjanyakch that introduced the
|| appPreferences.isScreenLocked

@sowjanyakch can you summarize why this was done?

[sowjanyakch]

PR #3716 introduced
|| appPreferences.isScreenLocked
to hide the screen contents from recents screen when screen lock is enabled. However, this created an issue #4076. @parneet-guraya can you try to fix #4076 without breaking the feature hiding screen contents from recents screen?