The big keyguard transition refactor (3/n)

Notify activity manager when dreaming showing state changed so
KeyguardController can update the occluded state when the device
is dreaming.

Test: Set dreaming while charging, wait until screen times out,
make sure that dream is occluding Keyguard.
Bug: 32057734
Change-Id: Ied6f485d9b4a1526cb4cd5f0701f86b1ea05830a
diff --git a/services/tests/servicestests/src/com/android/server/wm/TestWindowManagerPolicy.java b/services/tests/servicestests/src/com/android/server/wm/TestWindowManagerPolicy.java
index 5148e55..bff2ca3 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TestWindowManagerPolicy.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TestWindowManagerPolicy.java
@@ -536,6 +536,11 @@
     }
 
     @Override
+    public boolean isShowingDreamLw() {
+        return false;
+    }
+
+    @Override
     public void onKeyguardOccludedChangedLw(boolean occluded) {
     }