add button to download android SDK's

[unitycoder]

• add context menu item to download android sdk's
• get list of download files from unity releases api (for that unity version)
• download them to temp folder
• unzip into target folder (releases api has example paths, but need to allow user to set sdk root folder)

can get download files from
https://services.api.unity.com/unity/editor/release/v1/releases?limit=25&offset=0

[hifron]

android is more sdkmanager oriented(not in Unity integration yet) like

#sdkmanager --update
#sdkmanager --list_installed

#sdkmanager --list
# if newer there is also same version build tools required by Android Studio also if newer installed
#sdkmanager --uninstall "build-tools;34.0.0"
#sdkmanager --uninstall "platforms;android-34"
#sdkmanager --install "platforms;android-35"
#sdkmanager --install "platform-tools"
#sdkmanager --install "emulator"
#sdkmanager --uninstall "sources;android-34"
#sdkmanager --install "sources;android-35"
#required for Android Studio for Android 14
#sdkmanager --install "system-images;android-35;google_apis;x86_64"
#sdkmanager --install "build-tools;35.0.0"

there could also be google-installer like in Ubuntu... without much Android Studio need, but licenses are there...