buildserver: stop installing 'android;m2repository' by default
buildserver: stop installing 'android;m2repository' by default

It is a huge package, it is rarely used, its not supported by
fdroid/sdkmanager yet, and it is a pain to manage the install.  If this
breaks any app builds, the package can be installed as part of the build
metadata.

f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver