Clear mForceTraversal

Fixes regression from 6bdec7d9c62ed47f9fd0e0cb9e59f0cbe48b4bae

Change-Id: I839682e5daa407994de3714803e1e92c0bbbc4fe
Merged-In: I839682e5daa407994de3714803e1e92c0bbbc4fe
Test: go/wm-smoke
Fixes: 188546439
Bug: 190472229
(cherry picked from commit 05fc88302dee5dcd6b0960005789c4214d32c30d)
1 file changed