fwupd installs by default firmware-packager (a python3 script) into
the CrOS image. CrOS does not support python3 interpreter and fails
passing the TestValidInterpreter. Removing this script from the default
installation fixes the issue.
TEST=emerge-sarien fwupd
BUG=chromium:857263,b/121131967
Change-Id: I855c7994fd15faa0ce3d520734537674d7538b4e
1) Remove the confusing --firmware-id and build this field dynamically based on GUID and Developer name
2) Make developer name mandatory
3) Rename device-unique-id to device-guid to more closely reflect how fwupdmgr shows it
4) Allow running on Windows