Merge "Unblock screen-on after start transaction is completed" into main

core/java/android/window/flags/windowing_frontend.aconfig

...ava/com/android/server/display/DisplayManagerService.java

...java/com/android/server/display/LogicalDisplayMapper.java

...re/java/com/android/server/policy/PhoneWindowManager.java

...e/java/com/android/server/policy/WindowManagerPolicy.java

...re/java/com/android/server/wm/DeferredDisplayUpdater.java

services/core/java/com/android/server/wm/DisplayContent.java

services/core/java/com/android/server/wm/DisplayPolicy.java

services/core/java/com/android/server/wm/DisplayUpdater.java

services/core/java/com/android/server/wm/Transition.java

...core/java/com/android/server/wm/WindowManagerService.java

.../com/android/server/display/LogicalDisplayMapperTest.java

.../android/server/wm/DisplayContentDeferredUpdateTests.java

...ts/src/com/android/server/wm/TestWindowManagerPolicy.java