unity accept licenses 29.0.2 android code example

Example: To build this project, accept the SDK license agreements and install the missing components using the Android Studio SDK Manager.

# Android SDK Tools 25.2.3 and lower. Install the latest `platform-tools` for android-25
android update sdk --no-ui --all --filter platform-tools,android-25,extra-android-m2repository

# Android SDK Tools 25.2.3 and higher
sdkmanager --update