Gamma change fix

[trollLemon]

Fixed bug where low gamma values weren't applied due to the battery state of charge not included to check if the battery status changed.

Now, the code uses the battery state of charge to determine status changed, but only changes the screen to low gamma once. We use a bool to keep track if the screen was set to low.

[codecov]

Codecov Report

Merging #35 (5de24e1) into main (63cb5c8) will increase coverage by 1.54%.
The diff coverage is 46.66%.

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
+ Coverage   36.63%   38.18%   +1.54%     
==========================================
  Files           4        4              
  Lines         101      110       +9     
==========================================
+ Hits           37       42       +5     
- Misses         64       68       +4     

Files Changed	Coverage Δ
src/daemon/mod.rs	36.26% <46.66%> (+2.11%)	⬆️