概要

AndroidExternalToolsSettings を使えば取得できる

Debug.Log( AndroidExternalToolsSettings.ndkRootPath );
Debug.Log( AndroidExternalToolsSettings.sdkRootPath );
Debug.Log( AndroidExternalToolsSettings.jdkRootPath );
Debug.Log( AndroidExternalToolsSettings.gradlePath );
Debug.Log( AndroidExternalToolsSettings.keystoresDedicatedLocation );
Debug.Log( AndroidExternalToolsSettings.maxJvmHeapSize );
Debug.Log( AndroidExternalToolsSettings.stopGradleDaemonsOnExit );