Create DeviceMode enum for modes a device can be set to

PiperOrigin-RevId: 399462483

espresso/core/java/androidx/test/espresso/device/controller/BUILD.bazel

@@ -8,7 +8,10 @@ package(default_visibility = ["//espresso/core/java/androidx/test/espresso/devic
 
 kt_android_library(
     name = "controller",
-    srcs = ["DeviceController.kt"],
+    srcs = [
+        "DeviceController.kt",
+        "DeviceMode.kt",
+    ],
     deps = [],
 )
 

espresso/core/java/androidx/test/espresso/device/controller/DeviceMode.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2021 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 androidx.test.espresso.device.controller
+
+/** Enum for modes a foldable device can be set to. */
+enum class DeviceMode(val mode: Int) {
+  // the device screen is completely flat, like a tablet
+  FLAT(0),
+  // the device is folded with the hinge in a horizontal position
+  TABLETOP(1),
+  // the device is folded with the hinge in a vertical position
+  BOOK(2),
+}