Fix Getting and Setting Excluded Modules: Ringtone and Canned Messages

[pdxlocations]

This PR adds checking the excluded_modules bitmask in our metadata before getting/setting Ringtone and Canned Messages.

Fixes #814

[codecov]

Codecov Report

❌ Patch coverage is 45.16129% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.95%. Comparing base (2b10459) to head (7e3d347).

Files with missing lines	Patch %	Lines
meshtastic/node.py	25.00%	15 Missing ⚠️
meshtastic/__main__.py	81.81%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #818      +/-   ##
==========================================
- Coverage   60.11%   59.95%   -0.16%     
==========================================
  Files          24       24              
  Lines        4217     4243      +26     
==========================================
+ Hits         2535     2544       +9     
- Misses       1682     1699      +17     

Flag	Coverage Δ
unittests	59.95% <45.16%> (-0.16%)	⬇️

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