Introduce PointerChoreographer stage in C++

PointerChoreographer will be the new inputflinger component responsible
for managing the pointer icons drawn on the screen.

In this CL, we set up the PointerChoreographer InputListener stage,
which will be created when the choreographer is enabled.

Bug: 293587049
Bug: 278783893
Test: adb shell setprop persist.input.enable_pointer_choreographer 1;
      boot
Change-Id: Ice610055ef7ffc44c7c3e1d3904715eabda31a86
diff --git a/services/inputflinger/tests/Android.bp b/services/inputflinger/tests/Android.bp
index f2e8885..6410046 100644
--- a/services/inputflinger/tests/Android.bp
+++ b/services/inputflinger/tests/Android.bp
@@ -58,6 +58,7 @@
         "InstrumentedInputReader.cpp",
         "LatencyTracker_test.cpp",
         "NotifyArgs_test.cpp",
+        "PointerChoreographer_test.cpp",
         "PreferStylusOverTouch_test.cpp",
         "PropertyProvider_test.cpp",
         "SlopController_test.cpp",
diff --git a/services/inputflinger/tests/PointerChoreographer_test.cpp b/services/inputflinger/tests/PointerChoreographer_test.cpp
new file mode 100644
index 0000000..7237424
--- /dev/null
+++ b/services/inputflinger/tests/PointerChoreographer_test.cpp
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2023 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.
+ */
+
+#include "../PointerChoreographer.h"
+
+#include <gtest/gtest.h>
+#include <vector>
+
+#include "TestInputListener.h"
+
+namespace android {
+
+// Helpers to std::visit with lambdas.
+template <typename... V>
+struct Visitor : V... {};
+template <typename... V>
+Visitor(V...) -> Visitor<V...>;
+
+// --- PointerChoreographerTest ---
+
+class PointerChoreographerTest : public testing::Test, public PointerChoreographerPolicyInterface {
+protected:
+    TestInputListener mTestListener;
+    PointerChoreographer mChoreographer{mTestListener, *this};
+
+    std::shared_ptr<PointerControllerInterface> createPointerController() { return {}; }
+};
+
+TEST_F(PointerChoreographerTest, ForwardsArgsToInnerListener) {
+    const std::vector<NotifyArgs> allArgs{NotifyInputDevicesChangedArgs{},
+                                          NotifyConfigurationChangedArgs{},
+                                          NotifyKeyArgs{},
+                                          NotifyMotionArgs{},
+                                          NotifySensorArgs{},
+                                          NotifySwitchArgs{},
+                                          NotifyDeviceResetArgs{},
+                                          NotifyPointerCaptureChangedArgs{},
+                                          NotifyVibratorStateArgs{}};
+
+    for (auto notifyArgs : allArgs) {
+        mChoreographer.notify(notifyArgs);
+        EXPECT_NO_FATAL_FAILURE(
+                std::visit(Visitor{
+                                   [&](const NotifyInputDevicesChangedArgs& args) {
+                                       mTestListener.assertNotifyInputDevicesChangedWasCalled();
+                                   },
+                                   [&](const NotifyConfigurationChangedArgs& args) {
+                                       mTestListener.assertNotifyConfigurationChangedWasCalled();
+                                   },
+                                   [&](const NotifyKeyArgs& args) {
+                                       mTestListener.assertNotifyKeyWasCalled();
+                                   },
+                                   [&](const NotifyMotionArgs& args) {
+                                       mTestListener.assertNotifyMotionWasCalled();
+                                   },
+                                   [&](const NotifySensorArgs& args) {
+                                       mTestListener.assertNotifySensorWasCalled();
+                                   },
+                                   [&](const NotifySwitchArgs& args) {
+                                       mTestListener.assertNotifySwitchWasCalled();
+                                   },
+                                   [&](const NotifyDeviceResetArgs& args) {
+                                       mTestListener.assertNotifyDeviceResetWasCalled();
+                                   },
+                                   [&](const NotifyPointerCaptureChangedArgs& args) {
+                                       mTestListener.assertNotifyCaptureWasCalled();
+                                   },
+                                   [&](const NotifyVibratorStateArgs& args) {
+                                       mTestListener.assertNotifyVibratorStateWasCalled();
+                                   },
+                           },
+                           notifyArgs));
+    }
+}
+
+} // namespace android