Fix high resolution camera performance on mobile by allowing a default resolution

[ROBYER1]

Use a manually set default resolution within 300px to choose the nearest default resolution on mobile. Is auto-selected if the value matches or if it is within the 300px range
-Prevents huge performance issues on phones with high resolution cameras when using the sample app

[ROBYER1]

Thanks for the change suggestions - I learnt some good practices for PRs here also which I will use in future when making PRs. If you need any explicit changes to this, let me know!

[ROBYER1]

Updated now only WebCamSource does the switching, the only outstanding issue I can see (other than me hopefully finally sorting the .cs scripts to be lf not crlf - sorry about that!) is that the resolution dropdown in the config menu doesn't actually show the current resolution being used when it is set automatically in WebCamSource.cs.

Wondering what is the best way to approach that?

[homuler]

Wondering what is the best way to approach that?

Revert all the changes in ImageSourceConfig.cs
https://github.com/homuler/MediaPipeUnityPlugin/pull/347/files#diff-e59ac127e792a73fca8e43e5201c656b7eb7f23e40684d0ed549ea4a40aa2e3a

[ROBYER1]

All sorted there now, if there is anything else needing to be changed on this, let me know. I'm going to get back to looking into the graph latency issue this week but I'm pretty stumped with that as I'm still learning how the new sample app works.

[homuler]

Thanks. I think we're almost there.

[ROBYER1]

All done, thanks for your help on this also 🦾 Seems the Github pull request commits I can make off your changes also makes the line endings in files changed on Github crlf - I'll have to see if that's a setting on my end on the Github website!

[homuler]

Thanks!
LGTM