Apply playback factor on startup, pass Volume and recalculate ByteLimits

[h3ndrik]

I've made a few smaller fixes:

1. The Playback factor isn't set on startup, just after the first interval which doesn't ever happen for the Fixed version. I've added this to the initial sync.
2. The Volume isn't set passed at startup. Well it is, but it gets overwritten by the default vol_cfg
3. Also I think the mute function was missing a conversion
4. I've included a workaround for TimedStream: recalculate ByteLimits when setting values arduino-audio-tools#1407 in timed_stream. I can drop that commit if you like.

Regarding the TimedStream: There is still something wrong. It still doesn't make a difference what I set. I can't wrap my head around that... Is this code alright?:

https://github.com/pschatzmann/arduino-audio-tools/blob/70a927ff23fae2f0fece2da85b0a9ba51b15edf7/src/AudioTools/AudioIO.h#L277-L279

In case this returns false: Does whover writes to it actually keep the samples in buffer so we actually delay it? Or are the buffers dropped on 'false' and we start with the same data anyways?

[pschatzmann]

I think the logic in setVolume to divide by 100.0 is wrong!
The comments in the SnapClient says that the values are between 0.0 and 1.0. That's also the range that the VolumeStream expects.

[h3ndrik]

I think b9e9059 doesn't work as intended. Now my initial volume is 8.0 instead of 0.08. Maybe the server message needs to be divided by 100.

[pschatzmann]

good point! I agree...

[pschatzmann]

I committed the correction!