Ignore "non-value" attribute values for sensors

[puddly]

Zigpy currently provides a way to determine if a value is a "non-value" for a type. This is easily supported for numeric types but not so much for more complex ones, like arrays and such. This PR will globally fix invalid sensor readings showing up in the frontend.

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 96.66%. Comparing base (2e8fbe8) to head (4d9b897).

Files with missing lines	Patch %	Lines
zha/application/platforms/sensor/__init__.py	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #414      +/-   ##
==========================================
- Coverage   96.68%   96.66%   -0.02%     
==========================================
  Files          61       61              
  Lines        9834     9840       +6     
==========================================
+ Hits         9508     9512       +4     
- Misses        326      328       +2     

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[oddlama]

Since this is a draft, can I use this to patch my local instance and test it, or do you consider it work in progress?

[puddly]

Sure! I haven't written unit tests for it but have tested it at runtime with a device.