This API allows an application to cancel deferred high-level input events already in flight. It forms one tool of several to help apps debounce input events and prevent things like multiple startActivity calls, FragmentTransactions, etc. from executing when only one was desired since it's otherwise not desirable for things like click events to fire synchronously. Change-Id: I60b12cd5350898065f0019d616e24d779eb8cff9