Chip announces to screen readers as "dimmed" even when active

### Current behaviour
Chips announce as "dimmed" to screen readers even when they have an `onPress`

### Expected behaviour
They probably shouldn't ever announce as "dimmed", since chips tend to be either active buttons, or informational; rarely disabled buttons. I'm assuming this is an unintentional side-effect of the construction of this component.

### How to reproduce?
Interact with a `` component with VoiceOver.

### Preview

### What have you tried so far?
Setting `disabled={false}` does not address the issue. (It's `false` by default anyway.)

PRs aren't being approved right now, so I haven't bothered working one up; this is to make sure the issue is recorded and known. If the library starts being maintained again and PRs are approved and merged, I can look into the internals and try to address the issue in a PR.

### Your Environment

| software | version
| --------------------- | -------
| ios | 26
| android | 16
| react-native | 0.7.9
| react-native-paper | 5.14.5
| node | x.x.x
| npm or yarn | x.x.x
| expo sdk | x.x.x

首先定位 Chip 组件的可访问性实现，并使用 VoiceOver 重现播报。确认活动芯片和信息芯片的行为，然后验证已禁用的芯片仍会传达其禁用状态；完成标准是活动芯片不再被播报为 "dimmed"。

由索引模型根据 Issue 内容生成。