Merge "Add launcher for night mode" into rvc-dev am: 3e2aeedd4e am: 2ceb6378cf am: c8f4595b3e am: 6a8d19d5c2

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/DocumentsUI/+/11738497

Change-Id: I9d4c062dada0aeb4f2c14261e58975ca9038b7ef