Selendroid-standalone argument -emulatorOptions to handle multiple options for emulator

Currently, as of version 244d8d031d from 11th of November 2014,  Selendroid-standalone argument -emulatorOptions can handle only one argument - i.e. it will pass only one argument to emulator process.

This pull request changes DefaultAndroidEmulator to handle -emulatorOptions as multiple options for emulator.