Allow custom Image component in Card.Cover

**Is your feature request related to a problem? Please describe.**
The Image component from react-native has issues with passing headers, the headers are necessary when images require authentication.

**Describe the solution you'd like**
A possible fix is to allow the user to provide a custom image component to use e.g: Image from expo-image

**Describe alternatives you've considered**
I don't see alternatives other than defining my own Card.Cover by copying the code and adding expo-image instead react-native's one.

**Additional context**

首先定位 Card.Cover 的实现以及 issue 中描述的 react-native Image 用法，然后检查相邻组件的 API 约定。当 Card.Cover 能够使用调用方提供的图像组件（包括支持经过身份验证的图像 header 的组件），同时不丢失现有行为时，工作就完成了。

由索引模型根据 Issue 内容生成。