Rename DBus definition files

Android build system expects DBus definition file name to end
with .dbus-xml extension. So rename DBus definition files
to make it consistent for both platforms.

Also update the output directory for adaptor headers, so that
it will be the same on both platforms.

Bug: 24164800
TEST=emerge-$BOARD --unmerge apmanager
TEST=sudo rm -rf /build/$BOARD/var/cache/portage/chromeos-base/apmanager
TEST=emerge-$BOARD apmanager

Change-Id: I808983591d0633fe37b83e54237575419476e2b5
9 files changed