Log accessibility floating menu ui changed when user drags then drops the widget.

Metrics council review bug: 197315430
Bug: 197315430
Bug: 174215647
Bug: 173941299
Test: m statsd_testdrive && statsd_testdrive 389

Change-Id: I6024e88a27565c59ccbbe5dd49cf97257fabd66b

packages/SystemUI/src/com/android/systemui/accessibility/floatingmenu/AccessibilityFloatingMenu.java

@@ -41,6 +41,7 @@ import androidx.annotation.NonNull;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.systemui.Prefs;
+import com.android.systemui.shared.system.SysUiStatsLog;
 
 /**
  * Contains logic for an accessibility floating menu view.
@@ -177,6 +178,9 @@ public class AccessibilityFloatingMenu implements IAccessibilityFloatingMenu {
     }
 
     private void onDragEnd(Position position) {
+        SysUiStatsLog.write(SysUiStatsLog.ACCESSIBILITY_FLOATING_MENU_UI_CHANGED,
+                position.getPercentageX(), position.getPercentageY(),
+                mContext.getResources().getConfiguration().orientation);
         savePosition(mContext, position);
         showDockTooltipIfNecessary(mContext);
     }