Add option to override Gradle version for Android emulated tests

[alex-iotiq]

Adding a new flag like --androidGradleVersion to override the project Gradle version.

Current version 3.4.0 creates creates Missing 'package' key attribute on element package at AndroidManifest.xml:11:5-64 error when using installDebug Gradle task. A solution is to update Gradle version in root build.gradle. See Stack Overflow and Stack Overflow 2.

Instead of modifying the root build.gradle it's possible to change Gradle version with module build.gradle:

• Set gradle version to 3.4.3 (Current version is 3.4.0)
• add google() to repositories

  buildscript {
  ...
  dependencies {
      ....
      classpath 'com.android.tools.build:gradle:3.4.3'
  }
  }