add play button for video messages

[sowjanyakch]

Resolve #5568

🖼️ Screenshots

🏚️ Before	🏡 After

🚧 TODO

• ...

🏁 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/5585.apk



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

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	99	99
Errors	0	0

SpotBugs

Category	Base	New
Bad practice	6	6
Correctness	10	10
Dodgy code	54	54
Internationalization	3	3
Malicious code vulnerability	3	3
Performance	4	4
Security	1	1
Total	81	81

[AndyScherzinger]

Issue but I am not sure it is easy to solve...

Incoming no preview but icon fallback

Same for outgoing

Can't tell if a layered drawable would work, also expect the loading spinner has the same issue but harder to spot given it is not permanently shown. The issue is basically that the image view of the preview seems stretched based on the outer container element via the flex-box logic.