Hello AML,
Sure, happy to help.
If you want HLS on Android, see http://player.kaltura.com/docs/api#Kaltura.LeadHLSOnAndroid
is it not enabled by default.
As far as generating the m3u8 manifest: yes. Kaltura does that by itself if you use https://github.com/kaltura/nginx-vod-module.
this project is included in CE with the kaltura-nginx package. See the link above for its documentation.
You can also configure Kaltura to use any CDN that knows how to do the same. We have modules to support most common CDNs, such as Akamai, CloudFront, Level 3, etc.