Add log to btif connection logger

Add a log for ease of debugging.  There is already a log before
each btif_sock_connection_logger call, so only verbose level is needed.

Bug: 295023364
Test: m com.android.btservices
Flag: EXEMPT logging change only
Change-Id: I08eb5d14d2f73de8bd61da4e03d37a599c65a50a