[TIMOB-27685] Android: Update hyperloop module to support gradle dependencies

*Summary:* In Titanium 9.0.0, we will be changing the Android app build system from "ant" to "gradle". This will be a breaking-change that will require the hyperloop module to change how it hooks into the build. But this is also a good opportunity to support gradle's "dependencies" feature which allows the hyperloop user to reference dependencies via their maven <groupId>:<libraryName>:<version> references. *Recommended Solution:* Add support for an optional "build.gradle" file to the following Titanium app project directory... ./platform/android/build.gradle The file can then reference dependences like this...

repositories {
	google()
	jcenter()
}

dependencies {
	implementation 'com.google.android.gms:play-services-ads:18.3.0'
}

*Note:* This feature depend on [TIMOB-19300] to be completed first.