Provide UI Customizations for Android Drop In UI (parity with iOS and Web)

[PenguinDan]

Is your feature request related to a problem? Please describe.

iOS and Web both provide APIs to customize the Braintree Drop-in UI. Respectively:

• https://github.com/braintree/braintree-ios-drop-in?tab=readme-ov-file#customization
• https://developer.paypal.com/braintree/docs/guides/drop-in/customization/javascript/v3#css

While Android is missing any ways to provide UI customizations and is missing feature parity with the specified platforms.

Describe the solution you'd like.

Provide an identical API to customize the Braintree Drop-in UI in parity of iOS https://github.com/braintree/braintree-ios-drop-in/blob/0ac6b12fe99a5b36cadf07e0c451e86158593209/Sources/BraintreeDropIn/Public/BraintreeDropIn/BTDropInUICustomization.h#L28

[warmkesselj]

Hi @PenguinDan is there a particular customization you are looking for?