Merge "Add a feature flag to guard the large screen feature in Settings app." into sc-v2-dev am: ed8dd882dc am: 2a084036e0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15595470

Change-Id: Id1ca3957b886a19fbf934c6c595cd63476f05069