Include react native image picker library and enable cropping for Channel Avatar

This image picker for react native supports cropping and a round circle for the avatar

https://github.com/ivpusic/react-native-image-crop-picker

Image picker https://design.minds.com/hosted/mobile/michael/mobile%23-channel/#artboard3

Cropper https://design.minds.com/hosted/mobile/michael/mobile%23-channel/#artboard4

• When the channel owner clicks on their profile picture (camera button)
• Display the image picker Select an Avatar from the camera roll / image gallery
• When the user selects and image allow them to crop and position the image
• Back button should go back to channel page and not change the image / display the old avatar
• Save button should go back to channel page and change the image
• Light mode and dark mode
• e2e and unit tests

https://design.minds.com/hosted/mobile/michael/mobile%23-channel/#artboard2