I'm not sure that the above is clear, so thought I would restate the position as I understand it:
Android applications, repackaged to run on BlackBerry devices, can be used on BB10 and PlayBook devices only. These can not be run on BBOS devices, i.e. BB 5/6/7.
The later releases of BB10, specifically 10.2+, supports Android applications developed using Jelly Bean 4.2.2.
PlayBook and previous levels of BB10, support Gingerbread 2.3.3.
So for example, my Z10, which is running BB10.1, would only be able to load repackaged Android applications developed using Gingerbread. My Curve, running OS 7.0, can't run any Android applications.