fix: load before-plugins.gradle in build.gradle to allow to overrid…

…e `androidBuildToolsVersion` and other vars

test-app/build.gradle

@@ -122,6 +122,15 @@ version of the {N} CLI install a previous version of the runtime package - 'tns
 
  }
 
+ def applyBeforePluginGradleConfiguration = { ->
+ def appResourcesPath = getAppResourcesPath()
+ def pathToBeforePluginGradle = "$appResourcesPath/Android/before-plugins.gradle"
+ def beforePluginGradle = file(pathToBeforePluginGradle)
+ if (beforePluginGradle.exists()) {
+ outLogger.withStyle(Style.SuccessHeader).println "\t + applying user-defined configuration from ${beforePluginGradle}"
+ apply from: pathToBeforePluginGradle
+ }
+ }
  def applyBuildScriptConfigurations = { ->
  def absolutePathToAppResources = getAppResourcesPath()
  def pathToBuildScriptGradle = "$absolutePathToAppResources/Android/rootbuildscript.gradle"
@@ -143,6 +152,7 @@ version of the {N} CLI install a previous version of the runtime package - 'tns
 
  initialize()
  applyBuildScriptConfigurations()
+ applyBeforePluginGradleConfiguration()
 
  def computeKotlinVersion = { -> project.hasProperty("kotlinVersion") ? kotlinVersion : "${kotlin_version}"
  }