HID Test: Gate workarounds with feature flags for future removal

* Gate workarounds with associated feature flags so that when feature
  flag is removed, the workaround can be cleaned up as well

Bug: 361800494
Bug: 354758065
Test: atest -v HidHostDualModeTest
Flag: remove_input_device_on_vup
Flag: prevent_duplicate_uuid_intent
Change-Id: Ia694a9408db5e39a116b4521aedada6892541270