Introduce net_test_btif_hh

Bug: 250006409
Bug: 265213364
Test: gd/cert/run
Tag: #refactor
BYPASS_LONG_LINES_REASON: Bluetooth likes 120 lines

Dirty-Cherry-pick because LeRand is not on qpr-dev

Merged-In: I8f67b45218856fb427e54e233b02eebdb59c852f
(cherry picked from commit a7633e1a)
Change-Id: Icfb1c36c1d298aab8782f9ab6e13b51917fde8b4