Commits work in progress on utilizing Android's native hardware (and software) decoding (and encoding) via MediaCodec.

git-svn-id: https://svn.java.net/svn/jitsi~svn/libjitsi@10438 198c5059-ef06-4ec0-9a75-fdd6b0ef00a6
All Metaswitch fixes to date
Fix build and add a gitignore file.