build: fix CI on android

This patch is far from perfect, but at least CI is fixed.
I opened other tickets to describe the TODO list.

Update Dockerfile to not use a random image
Avoid to build ffmpeg multiple times as it's already built in contrib.
Update android tools.
Update daemon
Start jenkinsfile
Remove useless version/branchVersion as it's in the manifest now

Change-Id: Ia64b18ac861a7839e40e83b36c0595534719cb89