Fix crash after adding item to a playlist caused by null thumbnail URL

[u7656655]

What is it?

• Bugfix (user facing)
• Feature (user facing)
• Codebase improvement (dev facing)
• Meta improvement to the project (dev facing)

Description of the changes in your PR

• Fixed crash that can occur when adding a video with a null thumbnail URL to a playlist.
• Crash was likely caused by incomplete API fetch due to a slow/unstable internet connection, possibly related to use of a VPN.
• Implemented a simple not null check on the thumbnail URL before performing a comparison on this value in the code.

Fixes the following issue(s)

• Fixes Crash after adding item to a playlist #11573

APK testing

The APK can be found by going to the "Checks" tab below the title. On the left pane, click on "CI", scroll down to "artifacts" and click "app" to download the zip file which contains the debug APK of this PR. You can find more info and a video demonstration on this wiki page.

Due diligence

• I read the contribution guidelines.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[TobiGr]

Thanks