Moving away from obsolete Display#getRealSize().

Step 2 (final): stopping using old API

Bug: 202567877, 227307209
Test: presubmit
Change-Id: Ic32740723a517b28f92dbdd32fc53e27831441cc
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index f270cd5..84ef149 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -1650,16 +1650,10 @@
     }
 
     Point getRealDisplaySize() {
-        final Point size = new Point();
-        getContext().getSystemService(WindowManager.class).getDefaultDisplay().getRealSize(size);
-        final Rect winMetricsHeight = getContext().getSystemService(WindowManager.class)
+        final Rect displayBounds = getContext().getSystemService(WindowManager.class)
                 .getMaximumWindowMetrics()
                 .getBounds();
-        final Point winMetricsSize = new Point(winMetricsHeight.width(), winMetricsHeight.height());
-        if (!winMetricsSize.equals(size)) {
-            fail("Display size mismatch: " + size + " vs " + winMetricsSize);
-        }
-        return size;
+        return new Point(displayBounds.width(), displayBounds.height());
     }
 
     public void enableDebugTracing() {