mtpd: Use Connection::acquire_name() from dbus-c++.

BUG=chromium:364547
TEST=Manual, Chrome media galleries still works.

Change-Id: I152d6e3b13c1661898a30632cb4ab9711de3920f
Reviewed-on: https://chromium-review.googlesource.com/195492
Commit-Queue: Lei Zhang <thestig@chromium.org>
Tested-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: mukesh agrawal <quiche@chromium.org>
2 files changed