Always start jack server before first call to jack

Also install and update the server if necessary.

The target start-jack-server produces no file so it's always built.
Since the dependency is "order only", it doesn't cause force rebuilt of
jack targets after start-jack-server execution.

Bug: 25443108

Change-Id: I1608d87d186694d47307e00337b1905f0b8079c4