Centering empty icon.

This is more correct way that what was rolled back here: ag/3922402.

Bug: 72222505
Test: Manual
Change-Id: I2cc4549db9b6a5965523d13ffde768b3e28bc7a6

quickstep/src/com/android/quickstep/views/RecentsView.java

@@ -945,7 +945,14 @@ public abstract class RecentsView<T extends BaseActivity>
             mEmptyTextLayout = null;
         }
 
-        if (mShowEmptyMessage && hasValidSize && mEmptyTextLayout == null) {
+        if (!mShowEmptyMessage) return;
+
+        // The icon needs to be centered. Need to scoll to horizontal 0 because with Clear-All
+        // space on the right, it's not guaranteed that after deleting all tasks, the horizontal
+        // scroll position will be zero.
+        scrollTo(0, 0);
+
+        if (hasValidSize && mEmptyTextLayout == null) {
             mLastMeasureSize.set(getWidth(), getHeight());
             int availableWidth = mLastMeasureSize.x - mEmptyMessagePadding - mEmptyMessagePadding;
             mEmptyTextLayout = StaticLayout.Builder.obtain(mEmptyMessage, 0, mEmptyMessage.length(),