gd: Fix reporting issues in le_scanning_manager.cc

- Anonymous advertising reports are not being defragmented.
  These events can relay up to 1650 bytes of data.

- Scan response for the extended scan api used with the filter
  accept list filtering are ignored and never reported.

- The advertising SID is not used as it should to disambiguate
  between advertising reports with the same advertising
  address.

- Extended advertising reports that are fragmented in the middle
  of a GAP data entry are not correctly reassembled.
  (PDL parsing will fail in this case)

Bug: 271589688
Test: atest LeScanningReassembler
Change-Id: I991fe8eadcd034541bcaba484bb8c2ad4b97997d