Fix USB display issues and profile index retrieval

[afayge]

After removing the USB, without a bound profile, only the "USB X" status is displayed. Only after this profile is bound can the Bluetooth status be displayed correctly.

PR check-list

• Branch has a clean commit history
• Additional tests are included, if changing behaviors/core code that is testable.
• Proper Copyright + License headers added to applicable files (Generally, we stick to "The ZMK Contributors" for copyrights to help avoid churn when files get edited)
• Pre-commit used to check formatting of files, commit messages, etc.
• Includes any necessary documentation changes.