Fix incorrect logic in touch explorer state transitions.

We should be able to transition from dragging to delegating states, but as it was the logic did not allow that.
Fix: 243354181
Test: Manual. Start to Perform a two-finger scroll but end up doing something else e.g. pinch.
Logs should show a state transition from dragging to delegating.

Change-Id: Id47c63a9bc8bcfd87d0535d35e6d48cc7e8c9307