Add UUID information for log in register scanner function

Shim layer register scanner function doesn't have UUID information which makes
it hard to distinguish when muiltiple registrations are ongoing. Thus
add that information to the log.

Bug: 347606822
Test: m com.android.btservices
Flag: EXEMPT, adding logs only
Change-Id: If805d9888ba6208117cbf78157acd7707331c3a7