Add capitalization to First and Last name in profile

[pippi1otta]

• [x] I have searched open and closed issues for duplicates
• [x] I am submitting a bug report for existing functionality that does not work as intended
• [x] I have read https://github.com/signalapp/Signal-Android/wiki/Submitting-useful-bug-reports
• [x] This isn't a feature request or a discussion topic

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Bug description

The First and Last name in the profile do not have automatic capitalization set.

After adding capitalization to the Nickname activity in abfd9f8, I think the same should be done to the Your name activity under Profile, for symmetry.

Device info

Android version: 13.0 Signal version: 7.4.2