libnewblue: Pass connection parameters to hci

Take the connection parameters from Bluetooth/device and pass them all
the way down to the hci level. This change will have no effect to so
far, connection parameters passed down will be ignored.

BUG=b:141929301
TEST=build and manual test

Cq-Depend: chromium:1834748
Change-Id: Icfe4bcaa8c371360fb318ce6f1cf93b94971abd6
8 files changed