test-guidance-ui: Fix missing dependency

Test fails with:

O: Running test: traprain-0/test-guidance-ui.test
O: # random seed: R02S92b7ae01feaf79c62662edaae809f0d9
O: 1..5
O: # Start of guidance-ui tests
O: # Start of invocation tests
O: **
O: ERROR:tests/test-guidance-ui.c:72:create_proxy: assertion failed: (owner != NULL)
O: Bail out! ERROR:tests/test-guidance-ui.c:72:create_proxy: assertion failed: (owner != NULL)
O: FAIL: traprain-0/test-guidance-ui.test (Child process killed by signal 6)

and dbus-monitor:

method call time=1563895710.503717 sender=:1.41 -> destination=org.freedesktop.DBus serial=5 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=StartServiceByName
   string "org.apertis.NavigationGuidance1.TurnByTurn"
   uint32 0
error time=1563895710.503730 sender=org.freedesktop.DBus -> destination=:1.41 error_name=org.freedesktop.DBus.Error.ServiceUnknown reply_serial=5
   string "The name org.apertis.NavigationGuidance1.TurnByTurn was not provided by any .service files"

The org.apertis.NavigationGuidance1.TurnByTurn service is provided by traprain-guidance-ui package.

Fixes: APERTIS-5332

Signed-off-by: Frédéric Danis frederic.danis@collabora.com