Use a container surface + input channel for intercept layer instead of SCVH

- We don't draw anything in this layer and can skip any buffer allocation
  for it

Bug: 433055104
Flag: EXEMPT bugfix
Test: Verify offscreen touch & intercept logic does not change when in
      90/10
Change-Id: I976509e89b867a45993b6d8a65a3e86a76816867