Enable BnB coin selection for preset inputs and subtract fee from outputs
Summary:
- Use BnB when preset inputs are selected
- Allow BnB when subtract fee from outputs
This is a backport of Core PR17290
Test Plan:
ninja all check-all
Reviewers: #bitcoin_abc, Fabien
Reviewed By: #bitcoin_abc, Fabien
Differential Revision: https://reviews.bitcoinabc.org/D7674