[sr-dev] moving is_audio_on_hold() to sdpops module

[Daniel-Constantin Mierla]

Hello,

some time ago you added is_audio_on_hold() function to textops. Now 
there is a sdpops module more suitable for such operations. Is it ok to 
move it there? is_audio_on_hold() is new in upcoming 3.2.0 so it is 
better to have it in right place before first major release where it is 
present.

Thanks,
Daniel

-- 
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