CB-13721 (Android): fix build apps that use cdvHelpers.getConfigPreference

[jcesarmobile]

Platforms affected

Android

What does this PR do?

Fix the location of the config.xml so cdvHelpers.getConfigPreference works

What testing has been done on this change?

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
• Added automated test coverage as appropriate for this change.

[codecov-io]

Codecov Report

Merging #424 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #424   +/-   ##
=======================================
  Coverage   43.91%   43.91%           
=======================================
  Files          17       17           
  Lines        1710     1710           
  Branches      317      317           
=======================================
  Hits          751      751           
  Misses        959      959

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[macdonst]

@jcesarmobile it looks good to me. I haven't done any testing so I'm assuming that cordova-android uses platforms/android/app as the base directory.