Reland "Route dream touch handling to scene container"

Relanding with test fix to ShadeTouchHandlerTest.

This reverts commit ddb13c39.

Bug: 371340996
Fixed: 371340996
Test: atest BouncerFullscreenSwipeTouchHandlerTest BouncerSwipeTouchHandlerTest ShadeTouchHandlerTest
Flag: com.android.systemui.scene_container
Change-Id: I2adebe8308b0d8eec190b84d4c990492c8a8de9e