Expose selector draw condition for test

There is no other way for a test to inspect whether the
selector drawable will be drawn or not. This adds a hidden
test api to expose it

Bug: 67881712
Test: AbsListViewTest#testSelectorOnScreen
Change-Id: I3b6d25a0c8cb0c5f6c8bfc45eaa2660caa133b7d

api/test-current.txt

@@ -1037,6 +1037,10 @@ package android.view.autofill {
 
 package android.widget {
 
+  public abstract class AbsListView extends android.widget.AdapterView implements android.widget.Filter.FilterListener android.text.TextWatcher android.view.ViewTreeObserver.OnGlobalLayoutListener android.view.ViewTreeObserver.OnTouchModeChangeListener {
+    method public final boolean shouldDrawSelector();
+  }
+
   public class CalendarView extends android.widget.FrameLayout {
     method public boolean getBoundsForDate(long, android.graphics.Rect);
   }

core/java/android/widget/AbsListView.java

@@ -19,6 +19,7 @@ package android.widget;
 import android.annotation.ColorInt;
 import android.annotation.DrawableRes;
 import android.annotation.NonNull;
+import android.annotation.TestApi;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Configuration;
@@ -2744,13 +2745,21 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
     }
 
     private void drawSelector(Canvas canvas) {
-        if (!mSelectorRect.isEmpty()) {
+        if (shouldDrawSelector()) {
             final Drawable selector = mSelector;
             selector.setBounds(mSelectorRect);
             selector.draw(canvas);
         }
     }
 
+    /**
+     * @hide
+     */
+    @TestApi
+    public final boolean shouldDrawSelector() {
+        return !mSelectorRect.isEmpty();
+    }
+
     /**
      * Controls whether the selection highlight drawable should be drawn on top of the item or
      * behind it.