Fix mismatching surfaces position when entering split with two intents

Updates the sequence of indicating side stage position in startIntents
to make sure to use the same and the correct split position to update
both window bounds and surface bounds.

Bug: 290167860
Test: repro steps of the bug
Change-Id: I299a5d6a7195c26a9caad904796e39c0db3113bf

libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java

@@ -732,12 +732,12 @@ public class StageCoordinator implements SplitLayout.SplitLayoutHandler,
             mMainStage.activate(wct, false /* reparent */);
         }
 
+        setSideStagePosition(splitPosition, wct);
         mSplitLayout.setDivideRatio(splitRatio);
         updateWindowBounds(mSplitLayout, wct);
         wct.reorder(mRootTaskInfo.token, true);
         setRootForceTranslucent(false, wct);
 
-        setSideStagePosition(splitPosition, wct);
         options1 = options1 != null ? options1 : new Bundle();
         addActivityOptions(options1, mSideStage);
         if (shortcutInfo1 != null) {