feat(android): extend gradle.properties / local.properties

[hansemannn]

JIRA: https://jira.appcelerator.org/browse/TIMOB-27696

Also adds the generated Android Studio files to the .gitignore

[build]

	Warnings
⚠️	🔍 Can't find junit reports at ./junit.*.xml, skipping generating JUnit Report.
⚠️	android/cli/lib/gradle-wrapper.js#L231 - android/cli/lib/gradle-wrapper.js line 231 – 'url.parse' was deprecated since v11.0.0. Use 'url.URL' constructor instead. (node/no-deprecated-api)

	Messages
📖	🎉 Another contribution from our awesome community member, hansemannn! Thanks again for helping us make Titanium SDK better. 👍
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.

Generated by 🚫 dangerJS against 9470bba

[hansemannn]

@sgtcoolguy Updated

[jquick-axway]

@hansemannn, I'm closing this PR in favor of PR #11428

It's implemented in a similar way. It still appends the app project's gradle.properties to the generated one. But I would prefer to keep the gradle-wrapper.js script as generic as possible so that we can use it on non-Titanium app projects too.