Fix incorrect case statement.

WINDOWING_MODE_FREEFORM was meant instead of WINDOW_STATE_FREEFORM.

Test: manual
Change-Id: I84755a6e2b962e9579556cc65ff715792b13d21e
diff --git a/services/core/java/com/android/server/am/ActivityMetricsLogger.java b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
index fdcb8c6..93c0f77 100644
--- a/services/core/java/com/android/server/am/ActivityMetricsLogger.java
+++ b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
@@ -5,6 +5,7 @@
 import static android.app.ActivityManager.StackId.INVALID_STACK_ID;
 import static android.app.ActivityManagerInternal.APP_TRANSITION_TIMEOUT;
 import static android.app.WindowConfiguration.WINDOWING_MODE_SPLIT_SCREEN_PRIMARY;
+import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
 import static android.app.WindowConfiguration.WINDOWING_MODE_SPLIT_SCREEN_SECONDARY;
@@ -127,7 +128,7 @@
             case WINDOWING_MODE_SPLIT_SCREEN_SECONDARY:
                 mWindowState = WINDOW_STATE_SIDE_BY_SIDE;
                 break;
-            case WINDOW_STATE_FREEFORM:
+            case WINDOWING_MODE_FREEFORM:
                 mWindowState = WINDOW_STATE_FREEFORM;
                 break;
             default: