Show icon when quiet time mode is active

[jorsmm]

In SDK 4.3 you can check if Quite Time is active.

Added quiet_time_is_active to permit C apps to check if Quiet Time is active on a watch.

Here is an example.

Could you please add this property to show the "mute" icon in the top-left corner (like notifications do):

[tilden]

FINALLY!!!!!

I will definitely try and get this added as soon as I have time.

[jorsmm]

Thanks Dan!