Add ConnectionService to enhance calling experience.

# Community Note
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# Tell us about your request
## What do you want us to build?
Add [ConnectionService](https://developer.android.com/reference/android/telecom/ConnectionService) to integrate with built-in phone app. iOS already has this [feature](https://aws.amazon.com/blogs/business-productivity/how-to-integrate-apples-callkit-into-ios-applications-using-the-amazon-chime-sdk/)

Which Amazon Chime SDK or feature area is this request for?
Such as: [amazon-chime-sdk-js](https://github.com/aws/amazon-chime-sdk-js), [amazon-chime-sdk-ios](https://github.com/aws/amazon-chime-sdk-ios), [amazon-chime-sdk-android](https://github.com/aws/amazon-chime-sdk-android), [amazon-chime-sdk-component-library-react](https://github.com/aws/amazon-chime-sdk-component-library-react), a new feature idea.

amazon-chime-sdk-android

## Tell us about the problem you are trying to solve and why is it hard?
The more details you provide us, the better we will be able to help you.
There is not much guide on implementing ConnectionService with Amazon Chime SDK.

## How are you currently solving a problem?
N/A

Are there any workarounds or mitigations you have used? Why is it not working for you?
N/A

## Additional context
Anything else we should know?

Start by reviewing Android's ConnectionService API and the amazon-chime-sdk-android integration points for calling. Done means the SDK integrates with the built-in phone app and provides guidance for implementing the feature; the issue names no files or tests to run.

Written by the indexing model from the issue text.