Hi Steve. I don't have any experience directly of video editing apps for Android as I have an iPhone/Pad (and I'm not much of a film maker either). However, my son uses the AndroVid app on his Samsung quite successfully for editing on the fly and he's becoming quite the teenage Peter Jackson these days! He does use a PC and AVS for the bigger jobs and final production.
Have a look at this - it might give you some ideas?
http://filmora.wondershare.com/video-editor/android-video-editor.html