[flexiglass] Fixes logging for falsing

The logic that was rejecting scene transitions due to falsing was
logging a success instead of a rejection.

Bug: 404470548
Test: manually verified that successful manual transitions log correctly
and that falsing-rejected manualk transitions also do
Flag: com.android.systemui.scene_container

Change-Id: Ie8996dee482112c8f620bc4a7f7d3db6a3e84ce2