Merge changes from topic "presubmit-am-a5c9a98efdd2430c9afe42bd3287deda"
* changes: [automerge] Extract Steps and StepQueue out of VibrationThread. 2p:7ca22de1152p:84432a6519[automerge] Extract Steps and StepQueue out of VibrationThread. 2p:7ca22de115
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