Revert "Extends the criteria width of split mode"

This reverts commit c829a97f13ca004fe8bbc263cff05543f474238e.

Reason for revert: <Observe behavior error after rotating the device>
Bug: 15786013

Change-Id: I58024f143f8c59f8b0cf50d5cd284f84600e36e6
diff --git a/src/com/android/settings/activityembedding/ActivityEmbeddingUtils.java b/src/com/android/settings/activityembedding/ActivityEmbeddingUtils.java
index fd66187..96c3777 100644
--- a/src/com/android/settings/activityembedding/ActivityEmbeddingUtils.java
+++ b/src/com/android/settings/activityembedding/ActivityEmbeddingUtils.java
@@ -28,7 +28,7 @@
 public class ActivityEmbeddingUtils {
     public static final float SPLIT_RATIO = 0.5f;
     // The smallest value of current width of the window when the split should be used.
-    private static final float MIN_CURRENT_SCREEN_SPLIT_WIDTH_DP = 720f;
+    private static final float MIN_CURRENT_SCREEN_SPLIT_WIDTH_DP = 600f;
     // The smallest value of the smallest-width (sw) of the window in any rotation when
     // the split should be used.
     private static final float MIN_SMALLEST_SCREEN_SPLIT_WIDTH_DP = 600f;