Avoid NSSL consuming touch events outside of drawBounds

Currently, NSSL consumes touch events outside of its
drawBounds, which leads to issues like, UMO not interactive
on notifications shade. This change give NSSL the ability to early
return false in onInterceptTouchEvents and skip child touch handlers
checking on the motion event when the event is outside of the NSSL's
draw bounds.

Fix: 424782176
Test: manual
Flag: com.android.systemui.scene_container
Change-Id: Ia92972e12f10f49790d3200da207c1d6aa795477