SF: Populate RE layer settings from layer snapshot and CE layer state

Make it easier to break FE dependencies to CE by populating
RE layer settings from a layer snapshot and CE layer composition state.

Test: presubmit
Test: go/wm-smoke
Bug: 238781169

Change-Id: I92bdc0a0f605c13e2dc1465c8d1ddfd17e554633
4 files changed