housekeeping: Added Android Resource Designer to .gitignore

[RLittlesII]

What kind of change does this PR introduce?

Still seeing instances of the Android Resource Designer file.

What is the current behavior?

Adding better removal of Resource Designer.

What is the new behavior?

No further Android Resource Designer files should make it in.

What might this PR break?

Android tests.

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Other information:

[codecov]

Codecov Report

Merging #2357 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2357   +/-   ##
=======================================
  Coverage   54.66%   54.66%           
=======================================
  Files         114      114           
  Lines        4341     4341           
  Branches      663      663           
=======================================
  Hits         2373     2373           
  Misses       1801     1801           
  Partials      167      167           

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