Was Android Froyo (2.2) / API Level 8 supported in Unity in any version? The minimum API Level I can choose in Unity 5.5 is Android Gingerbread 2.3.1 /API Level .
From Replies at https://forum.unity3d.com/threads/android-export-minimum-api-level.159543/ looks like unity 5.0 supported Android 2.2