When I tried your link the other day:
on my tablet running Android 4.2 I think I was able to play in about 5 seconds.
Right now I can't play at all, so perhaps the stream is not live?
Anyway, it would be useful to know what device manufacturer and model, plus
Android OS version you are running. Not sure but perhaps there's a known issue with that device?
What EC2 instance size/type are you running?
Try downloading this file to your own Wowza server 'content' folder:
Then try to stream/play from your Android devices with:
Do you get the same performance with that as you did when you tried from Wowza's own instance earlier?