Moving a few testing classes to a separate package

Change-Id: Ied1c063de3e938695493e4937f554686e0719dad

src/com/android/launcher3/testing/DummyWidget.java

@@ -0,0 +1,53 @@
+package com.android.launcher3.testing;
+
+import android.appwidget.AppWidgetProviderInfo;
+
+import com.android.launcher3.CustomAppWidget;
+import com.android.launcher3.R;
+
+public class DummyWidget implements CustomAppWidget {
+    @Override
+    public String getLabel() {
+        return "Dumb Launcher Widget";
+    }
+
+    @Override
+    public int getPreviewImage() {
+        return 0;
+    }
+
+    @Override
+    public int getIcon() {
+        return 0;
+    }
+
+    @Override
+    public int getWidgetLayout() {
+        return R.layout.zzz_dummy_widget;
+    }
+
+    @Override
+    public int getSpanX() {
+        return 2;
+    }
+
+    @Override
+    public int getSpanY() {
+        return 2;
+    }
+
+    @Override
+    public int getMinSpanX() {
+        return 1;
+    }
+
+    @Override
+    public int getMinSpanY() {
+        return 1;
+    }
+
+    @Override
+    public int getResizeMode() {
+        return AppWidgetProviderInfo.RESIZE_BOTH;
+    }
+}