Merge "Custom dark theme scheduling"

api/current.txt

api/system-lint-baseline.txt

core/java/android/app/IUiModeManager.aidl

core/java/android/app/UiModeManager.java

core/java/android/provider/Settings.java

core/java/android/util/TimeUtils.java

core/proto/android/app/settings_enums.proto

packages/SystemUI/res/values/strings.xml

...UI/src/com/android/systemui/qs/tiles/UiModeNightTile.java

...es/core/java/com/android/server/UiModeManagerService.java

...ests/src/com/android/server/UiModeManagerServiceTest.java