hodec2: cosmetic: clarify afs_bias, simplify pick_better_lchan_to_move()

Instead of passing the TCH/H -> TCH/F bias (AFS bias) in local
variables, rather store it in the ho_candidate struct next to the other
rxlev related values.

Add the AFS bias to the compared rxlev in pick_better_lchan_to_move().

Modify pick_better_lchan_to_move() to simpler semantics of returning
either a or b.

No functional change.

Change-Id: I73860abdf2a77270ca4851ad58c09767d1bb08f1
1 file changed