HCI interface improvements

This patch improves btu_hcif_send_cmd_with_cb, which will accept
base::Callback instead of function pointer as argument. It will also
carry information about where was packet send from, which can be
displayed when command status is received, greatly improving logs.

The improved method is also used for handling VSC advertising.

Bug: 30622771
Test: sl4a ConcurrentBleAdvertiserTest
Change-Id: I55c3e32f9231c00bfa85f971265809d6f1fecdfb