[Peripherals] Fix missing controller icons in Peripheral Dialog

[garbear]

Description

Controller profiles were introduced for peripherals in #21182, and in #22856 it became possible to change a peripheral's appearance.

However, the appearance always depended on peripheral.joystick being used. On Android, the peripheral bus is in core instead of the add-on. As a result, peripheral icons aren't shown on Android.

This PR updates the peripheral bus base class to take icon into account, without needing the peripheral bus to be peripheral.joystick. As a result, peripheral icons are now shown on Android.

Motivation and context

Giving Android some love now that my NVidia Shield is working again.

How has this been tested?

Included in my latest round of test builds: https://github.com/garbear/xbmc/releases

What is the effect on users?

• Fixed peripheral icons not shown in Peripheral Dialog on Android

Screenshots (if appropriate):

Before:

After:

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Clean up (non-breaking change which removes non-working, unmaintained functionality)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that will cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• Student submission (PR was done for educational purposes and will be treated as such)
• None of the above (please explain below)

[garbear]

I've simplified the change. Now it's only a single line difference.

[garbear]

jenkins build this please