Also combine event-sending code with what used to be the InjectedPointerTracker class because that class was used for sending events anyway. Bug: 136131815: Test: atest CtsAccessibilityTestCases CtsAccessibilityServiceTestCases FrameworksServicesTests:TouchExplorerTest Change-Id: I7fae3dc958642d8fae61b9120c732d27af16fca9