Floss: Add support of inquiry by rssi in Floss

This allows Floss to use the sysprop: inq_by_rssi which modifies the
logic when the inquiry database is full from replacing the oldeset one
to replacing the one with the smallest rssi.

Bug: 236225499
Bug: 284813189
Test: manually
Change-Id: Ic2488e9ce847c835de568a6225d0fab90cb61b19