Remove android-studio stuff

Android-studio is still under heavy development and this shit is
changing too much, so switching from gradle-wrapper to local gradle
install

to use:
 - import
 - import from external model - gradle
   X use auto-import
   X Use local gradle distribution
   Gradle home: <path/to/your/gradle/install>

Change-Id: I0b773c68a735e23e5e88d46724b7c3e1a9f84d84