floss: Fix build

This fixes build breakage caused by http://ag/32312459

Bug: 398195386
Bug: 393449774
Bug: 403298034
Test: m com.google.android.bt
Test: floss/build/build-in-container.py
Test: emerge floss
Flag: EXEMPT, Floss only change
Change-Id: Ib66f7399146e7c8d1588b6ce4c7efa11b8e51f2e