Enable configuring audio device capabilities before starting a meeting

[dinmin-amzn]

ℹ️ Description

1. Added AudioDeviceCapabilities to enable configuring audio device capabilities before starting a meeting. The supported capabilities are:
   1. Input and Output (both microphone and speaker enabled)
   2. Output only (microphone disabled and speaker enabled, this is a new feature)
   3. None (both microphone and speaker disabled, this replaces AudioMode.noDevice)
2. Removed AudioMode.noDevice since it has been replaced by AudioDeviceCapabilities.none
3. [Demo] Added option to select audio device capabilities on join screen

Issue #, if available

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update
  • [x] README update
  • [x] CHANGELOG update
  • [ ] guides update
• [ ] This change requires a dependency update
  • [ ] Amazon Chime SDK Media
  • [ ] Other (update corresponding legal documents)

🧪 How Has This Been Tested?

A demo build of these changes has successfully gone through QA testing. Also manually tested the following scenarios:

1. Joined meeting with AudioDeviceCapabilities.inputAndOutput and verified that:
   1. Audio recording permissions were required
   2. Was able to send audio to remote attendee
   3. Was able to receive audio from remote attendee
2. Joined meeting with AudioDeviceCapabilities.outputOnly and verified that:
   1. Audio recording permissions were not required
   2. Was not able to send audio to remote attendee
   3. Was able to receive audio from remote attendee
3. Joined meeting with AudioDeviceCapabilities.none and verified that:
   1. Audio recording permissions were not required
   2. Was not able to send audio to remote attendee
   3. Was not able to receive audio from remote attendee

Additional Manual Test

• [ ] Pause and resume remote video
• [ ] Switch local camera
• [ ] Rotate screen back and forth

📱 Screenshots, if available

✅ Checklist

Integration validation (required before release)

• [x] Unit tests pass
• [x] Build SDK against simulator with release options
• [x] Build SDK against device with release options
• [x] Build SDK against simulator with debug options
• [x] Build SDK against device with debug options
• [x] Test Demo against simulator with SDK (debug build) in workspace
• [x] Test Demo against device with SDK (debug build) in workspace
• [x] Test DemoObjC against simulator with SDK (debug build) in workspace
• [x] Test DemoObjC against device with SDK (debug build) in workspace
• [x] Test Demo against simulator with SDK.framework (release build)
• [x] Test Demo against device with SDK.framework (release build)
• [x] Test DemoObjC against simulator with SDK.framework (release build)
• [x] Test DemoObjC against device with SDK.framework (release build)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[dinmin-amzn]

Same as Android, do we have a backlog item tracking the migration guide?

We don't, but I added a short migration note in the CHANGELOG