Add shadow to AdaptiveIconDrawables using View level shadow

Test: $ make RunSettingsRoboTests -j40
RunSettingsRoboTests: ......
RunSettingsRoboTests: Time: 151.394
RunSettingsRoboTests:
RunSettingsRoboTests: OK (1355 tests)
RunSettingsRoboTests:

Bug: 36088922

Change-Id: I5b5651d2305ab65e1358609a4110e248dee9eab2

tests/robotests/src/android/util/LauncherIcons.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.util;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+
+/**
+ * This class is only needed to get around RoboElectric issue.
+ */
+public final class LauncherIcons {
+
+    public LauncherIcons(Context context) {
+    }
+
+    public Drawable wrapIconDrawableWithShadow(Drawable drawable) {
+        return drawable;
+    }
+}