Merge "Report folding features to letterboxed apps." into tm-qpr-dev am: 59853012

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23351578



Change-Id: If941ab5cc905a61aced48bdd7c59003abb18cebc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>