Fix buzzer control on newer Gree firmwares

[thibaulf]

Newer firmware versions utilize BuzzerCtrl instead of Buzzer_ON_OFF to manage buzzer behavior. Note that the control logic between the two parameters is inverted:

• Buzzer Active: Buzzer_ON_OFF = 0 | BuzzerCtrl = 1
• Buzzer Inactive: Buzzer_ON_OFF = 1 | BuzzerCtrl = 0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.71%. Comparing base (8c0a824) to head (9cffb83).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #162   +/-   ##
=======================================
  Coverage   95.71%   95.71%           
=======================================
  Files           8        8           
  Lines         770      771    +1     
=======================================
+ Hits          737      738    +1     
  Misses         33       33           

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