ci/android: disable modem simulator in cuttlefish, it is not needed

Disable the modem simulator in cuttlefish, it is not needed for testing
the graphics subsystem and avoids opening a few vsock ports which
reduces the chance of collisions in case of multiple instances of
cuttlefish running concurrently.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33499>

.gitlab-ci/cuttlefish-runner.sh

@@ -56,6 +56,7 @@ HOME=/cuttlefish launch_cvd \
   -enable_audio=false \
   -enable_bootanimation=false \
   -enable_minimal_mode=true \
+  -enable_modem_simulator=false \
   -guest_enforce_security=false \
   -report_anonymous_usage_stats=no \
   -gpu_mode="$ANDROID_GPU_MODE" \