floss: Deprecated InitFlags

The InitFlags argument is not used in btif so this patch has no logical
change.

Bug: 370387120
Tag: #floss
Test: mmm packages/modules/Bluetooth
Test: USE=floss_upstream emerge-zork floss
Flag: EXEMPT, no logical change
Change-Id: I9e02024959486a14dca14875b2adaa31183d332c