Add logs to le_scanning_manager.cc

Add logs for scanner id information in le_scanning_manager.cc for better debugging when multiple scans are ongoing simultaneously.

Bug: 346472322
Test: m com.android.btservices
Flag: EXEMPT, adding logs only
Change-Id: I1b2e26c5e80f97f22c8fe8d8a4a1d3ffe11a7329