Implement ActivityStack operations

Implements new WM Extensions APIs for the overlay feature.
They are:
- #getActivityStackToken by tag
- #getParentContainerInfo by ActivityStack token
- #(un)registerActivityStackCallbacks

This CL also calls to ActivityStackAttributesCalculator
to update the overlay container bounds.

Test: atest OverlayPresentationTest
Bug: 295804279
Bug: 295803338
Bug: 270492365

Change-Id: Ib3fb27e74b87220da5057fd97594fed8fd0c6693