Add new keys for wifi, lfr, and battery

[mkmer]

Description:

The API has changed - appears the wifi_strength and battery_voltage keys have been removed and a new key:
signals:{'lfr': 5, 'wifi': 4, 'battery': 3} has been added.
If the new key (signals) exists, we populate the values using the sub keys, if not, fall back to previous key names.
Add "sync_signal_strength" to attributes.

I'm not sure if the original wifi_strength key was 0-5 or actual signal strength (I think was was signal strength).
I suppose we need to change the HA side to not show dBm? Should we do a percentage (5/5 = 100%, 1/5 - 20%) or maybe do this on the HA side?

Related issue (if applicable): fixes #
home-assistant/core#106509

Checklist:

• Local tests with tox run successfully PR cannot be meged unless tests pass
• Changes tested locally to ensure platform still works as intended
• Tests added to verify new code works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5e58c1a) 99.86% compared to head (6703cb8) 99.86%.
Report is 6 commits behind head on dev.

Additional details and impacted files

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  Coverage   99.86%   99.86%           
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  Files           8        8           
  Lines        1453     1458    +5     
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+ Hits         1451     1456    +5     
  Misses          2        2           

Flag	Coverage Δ
unittests	99.86% <100.00%> (+<0.01%)	⬆️

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[mkmer]

I think we need to go with a percentage and update HA to native unit of as a percentage.

[fronzbot]

I think if you just rip out the conversion to percentage (or make is a separate key if you really want it- either approach is fine with me) then we are good to merge.

[mkmer]

If we want to change the battery_voltage to battery_strength or battery_level, I would like to wrap that change into the HA update as well. Aka get the change in the next API release if we are going to do it.

• Looking at HA, we don't have a battery_voltage sensor, only the battery state - so timing doesn't really matter :)