`TextInput`: setting `activeUnderlineColor` to `"transparent"` makes the `TextInput` unable to receive touch events

### Current behaviour
Touch events are not registered.

I believe this is related to the New Architecture, per [this issue filed on React Native](https://github.com/facebook/react-native/issues/50465). However, the resolution to this issue was that this is expected behavior, so this is still a bug here.

### Expected behaviour
Touch events should register.

### How to reproduce?
Create a `TextInput` and set the `activeUnderlineColor` to `"transparent"`. (Even a very light gray seems to trigger the issue.)

### Preview

### What have you tried so far?

### Your Environment

| software | version
| --------------------- | -------
| ios | 18
| android | 16
| react-native | 0.79.3
| react-native-paper | 5.14.5
| node | x.x.x
| npm or yarn | x.x.x
| expo sdk | x.x.x

首先，在列出的 iOS 和 Android 版本上，使用 activeUnderlineColor="transparent" 的 React Native Paper TextInput 重现该问题。跟踪 TextInput 的入口点，并比较设置和不设置该颜色时的触摸处理；当触摸事件能够正常注册且下划线保持透明时，即表示完成。

由索引模型根据 Issue 内容生成。