Fix unintentional CurBar timeout bug.

The current logic:
1. Hide it when it's unexpanded/collapsed and not touched for 15 seconds.
2. Never hide it when it's expanded.

Bug: 417977577
Bug: 403422950
Flag: com.android.systemui.enable_underlay
Test: atest AmbientCueViewModelTest
Change-Id: I15d445bec19268ec1ec81860b302bb2ad2c5483f