adding android sdk to path code example

Example 1: add android sdk root to path

export ANDROID_HOME=~/Library/Android/sdk
export ANDROID_SDK_ROOT=~/Library/Android/sdk
export ANDROID_AVD_HOME=~/.android/avd

Example 2: windows 10 change ANDROID_HOME

For Windows:
set ANDROID_HOME=C:\ installation location \android-sdk
set PATH=%PATH%;%ANDROID_HOME%\tools;%ANDROID_HOME%\platform-tools