Migrate Tap exclusion logic to TaskEmbedder.

We want to pass the touches on ActivityView to the Activity inside ActivityView, not to be consumed by Activity hosting ActivityView.
To do that, we need to set a tap exclude region, so touches can go through.

Bug: 155424730
Test: Make sure the Activity inside ActivityView gets touch.
Change-Id: Ia9b2c7eba0c48512a633c798b1012e5fbec8422f
3 files changed