Merge "Add logging when attempting to dream from power press." into udc-dev am: d1c2ad1796 am: 22746b7e4d am: 71310f95cd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23214398

Change-Id: I911a6932d135d2c20c78e05f90b7fc7723b34064
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

services/core/java/com/android/server/policy/PhoneWindowManager.java

@@ -1095,6 +1095,8 @@ public class PhoneWindowManager implements WindowManagerPolicy {
 
         final DreamManagerInternal dreamManagerInternal = getDreamManagerInternal();
         if (dreamManagerInternal == null || !dreamManagerInternal.canStartDreaming(isScreenOn)) {
+            Slog.d(TAG, "Can't start dreaming when attempting to dream from short power"
+                    + " press (isScreenOn=" + isScreenOn + ")");
             noDreamAction.run();
             return;
         }