flatpak shim: Add distribution management. Change-Id: Ic3659264b5da4114a5b18e7ce8f9649e58fb5318 Signed-off-by: Alexander Kurtakov <akurtako@redhat.com> Reviewed-on: https://git.eclipse.org/r/c/linuxtools/org.eclipse.linuxtools.eclipse-build/+/175460