Fix incorrect environment variables on macos runner

[cseteram]

Changes

When building an android application using game-ci/unity-builder on macos runner, it seems that there are the following bugs. First, it doesn't install android module when installing Unity. Second, when androidTargetSdkVersion is given, it doesn't install the appropriate android platform tools, which leads to build failures or wrong targeted SDK version.

This PR resolves these bugs by changing the following:

• Fix a typo in switch-case statement which determines editor's module to be installed.
• Set JAVA_HOME and ANDROID_HOME when installing android SDK.

Checklist

• Read the contribution guide and accept the code of conduct
• Readme (updated or not needed)
• Tests (added, updated or not needed)

[github-actions]

[codecov-commenter]

Codecov Report

Merging #499 (f764296) into main (28147e5) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main     #499   +/-   ##
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  Files          74       74           
  Lines        2890     2890           
  Branches      582      582           
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  Hits         1065     1065           
  Misses       1688     1688           
  Partials      137      137           

[cseteram]

The first issue was fixed in #501, so I updated the PR :)