Concurrent camera tests

[temcguir]

• Make CaptureModeToggleButton more testable

  • Adds test tag to CaptureModeToggleButton
  • Adds state descriptions to ToggleButton
  • Removes unnecessary coroutine scope from ToggleButton

• Add Concurrent Camera tests

  • Adds tests to ensure Concurrent Camera can be enabled without crashing the app, and appropriate features are disabled when concurrent camera mode is enabled.
  • Also ensures that recordings can be made in concurrent camera mode.