Fix split animation for grid RTL

Fixes: 202156862
Test: Tested grid + non grid,
RTL + LTR

Change-Id: I303f60efdd9f2f2ea412e31e574d9a3b50fecf30
diff --git a/quickstep/src/com/android/quickstep/views/FloatingTaskView.java b/quickstep/src/com/android/quickstep/views/FloatingTaskView.java
index a343e0a..adcaf65 100644
--- a/quickstep/src/com/android/quickstep/views/FloatingTaskView.java
+++ b/quickstep/src/com/android/quickstep/views/FloatingTaskView.java
@@ -129,7 +129,7 @@
     public void update(RectF position, float progress, float windowRadius) {
         MarginLayoutParams lp = (MarginLayoutParams) getLayoutParams();
 
-        float dX = position.left - lp.getMarginStart();
+        float dX = position.left - mStartingPosition.left;
         float dY = position.top - lp.topMargin;
 
         setTranslationX(dX);
@@ -155,10 +155,15 @@
         lp.ignoreInsets = true;
         // Position the floating view exactly on top of the original
         lp.topMargin = Math.round(pos.top);
-        lp.setMarginStart(Math.round(pos.left));
+        if (mIsRtl) {
+            lp.setMarginStart(mLauncher.getDeviceProfile().widthPx - Math.round(pos.right));
+        } else {
+            lp.setMarginStart(Math.round(pos.left));
+        }
+
         // Set the properties here already to make sure they are available when running the first
         // animation frame.
-        int left = lp.leftMargin;
+        int left = (int) pos.left;
         layout(left, lp.topMargin, left + lp.width, lp.topMargin + lp.height);
     }