Fix: Stylus button wrong tool when coming close again

[ComputerElite]

Closes #1456

This fixes the behavior described in #1456 by checking if the currentTool is still the eraser before changing back to the tmpTool stored when the stylus button was pressed.

Tested on Samsung Galaxy Tab S7 FE (Androi 14, OneUI 6.1)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 47.15%. Comparing base (22b31ad) to head (eb45038).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1457   +/-   ##
=======================================
  Coverage   47.15%   47.15%           
=======================================
  Files         114      114           
  Lines        9002     9002           
=======================================
  Hits         4245     4245           
  Misses       4757     4757           

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