Add Material You/Dynamic Theming

### What problem does this address?

Since Material You was announced, dynamic theming has been a selling point I look for in new applications. A dynamic theme for Pocket Casts would allow it to integrate more seamlessly into the overall look and feel of the device, but also provide a more personalize experience for the users.

### What is your proposed solution?

Migrate to material3 components for Android 12+ devices that support dynamic theming or integrate a library like [MonetCompat](https://github.com/KieronQuinn/MonetCompat) for broader device integration.

### Did you search for existing feature suggestions?

- [X] I have searched for existing feature suggestions.

Start by reviewing the Android app's current Material component usage and the Android 12+ dynamic theming requirements. Compare migrating to Material 3 components with integrating MonetCompat, then define the supported device range and theme behavior before implementation. Done means Pocket Casts follows the device's dynamic theme where supported.

Written by the indexing model from the issue text.