Avoid duplicated touch events

TouchExplorer doesn't check for double tap (and hold) so there may
be duplicated TYPE_TOUCH_INTERACTION_START/END events.

Bug: 66730372
Test: manual
Test: CtsAccessibilityServiceTestCases
Test: CtsAccessibilityTestCases
Change-Id: Iece13d3a401f13d8a7dcda2147b2865eee5e5f33