Changed the xml encoding to lowercase "utf-8"

[nokite]

PR's key points

Changed the xml encoding to lowercase "utf-8" which is more common.

How to review this PR?

Notice that other xml files in an Android project have the "utf-8" encoding in lowercase.

Definition of Done

• Tests added (if new code is added) - does not apply
• There is no outcommented or debug code left

[adriangl]

First of all, thanks a lot for the contribution @nokite!

I guess this change is just an aesthetic change to ensure XML consistency over all the Android XML files, right? Or did you run into any kind of issues? Anyway, looks good to me!

Just one thing though, could you please add the change in CHANGELOG.md so we can keep track of changes for the next release?

[nokite]

First of all, thanks a lot for the contribution @nokite!

I guess this change is just an aesthetic change to ensure XML consistency over all the Android XML files, right? Or did you run into any kind of issues? Anyway, looks good to me!

Just one thing though, could you please add the change in CHANGELOG.md so we can keep track of changes for the next release?

Yes, I believe it's purely an aesthetic change indeed, I didn't see any actual problems.

Sure, added!