When disconnecting from pause menu Cast icon is incorrectly toggled to pause icon

[jrgrafton]

This means that Cast can only be reconnected to from pause menu locally (differs from initial behaviour)

1. Start game
2. Connect to Cast
3. Pause game
4. Disconnect from Cast
5. Unpause game

Expect: Cast icon in top right
Actual: Pause icon in top right

[jrgrafton]

Recommended way to do this would be to have separate pause and Cast icon entities.

[LeonNicholls]

This is based on the UX compliant sample app. This should be discussed with UX team.