Added start and end to ifphetio so phetioEvents.start can be called without short circuit, see https://github.com/phetsims/chipper/issues/615
Added start and end to ifphetio so phetioEvents.start can be called without short circuit, see https://github.com/phetsims/chipper/issues/615

phetsims/joist,phetsims/joist,phetsims/joist