Geopolitical issues aside as far as living in Sri Lanka now, I think it wouldn't hurt as far as using it as a stepping stone to go elsewhere-since you said you are interested in the cadet program I assume you don't have the hours needed for EK or EY etc.

The only problem I have with it,without sounding negative, is that there is no guarantee of moving on to another airline. If you do go to Sri Lanka, be certain that you will be happy to remain at Sri Lankan for the long term just in case.

Good luck