Not using Settings in TaplTestsLauncher3.testDragAppIcon

Settings frequently crashes

Bug: 126587956
Change-Id: Ied62d6f8783d8f0f9c434bdd8ee14c62d6cbc4c1

tests/src/com/android/launcher3/testcomponent/BaseTestingActivity.java

@@ -20,6 +20,7 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.graphics.Color;
 import android.os.Bundle;
 import android.util.TypedValue;
 import android.view.View;
@@ -63,6 +64,7 @@ public class BaseTestingActivity extends Activity implements View.OnClickListene
         mView = new LinearLayout(this);
         mView.setPadding(mMargin, mMargin, mMargin, mMargin);
         mView.setOrientation(LinearLayout.VERTICAL);
+        mView.setBackgroundColor(Color.BLUE);
         setContentView(mView);
 
         registerReceiver(mCommandReceiver, new IntentFilter(mAction + SUFFIX_COMMAND));