Allow specifying no retries in MutableMicrophone class

[NeonDaniel]

Currently, the audio_producer will be stuck in an infinite loop if there is no mic attached. This adds a parameter so exceptions can be handled by the calling method (i.e. stop trying if there is no microphone available)

[codecov]

Codecov Report

Merging #168 (a97357f) into dev (6ceb058) will increase coverage by 2.62%.
The diff coverage is 41.62%.

@@            Coverage Diff             @@
##              dev     #168      +/-   ##
==========================================
+ Coverage   50.35%   52.97%   +2.62%     
==========================================
  Files         119      152      +33     
  Lines       10077     9482     -595     
==========================================
- Hits         5074     5023      -51     
+ Misses       5003     4459     -544     

Impacted Files	Coverage Δ
mycroft/audio/__main__.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/__main__.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/mark1/arduino.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/mark1/eyes.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/mark1/mouth.py	0.00% <0.00%> (ø)
mycroft/client/speech/__main__.py	0.00% <0.00%> (ø)
mycroft/client/speech/hotword_factory.py	0.00% <0.00%> (-88.89%)	⬇️
mycroft/client/speech/service.py	0.00% <0.00%> (ø)
mycroft/client/speech/silence.py	0.00% <0.00%> (-42.86%)	⬇️
mycroft/client/text/__init__.py	0.00% <0.00%> (ø)
... and 128 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a33d124...a97357f. Read the comment docs.