Revert^2 "InitFlags: Remove hci_adapter"

This reverts commit 75083ae2.

Reason for revert: relanding after addressing initial issue

InitFlags: Remove hci_adapter

Keep the workaround for floss as this is a floss only behavior

Bug: 290844854
Change-Id: If1d5b407d5484b6f166384b191c90c65092a2b35
Fix: 290844854
Test: m Bluetooth
Flag: EXEMPT, no logical change