Introduce InteractionJankMonitor into Settings

Detects the jank of page scrolling which is implemented by
InstrumentedPreferenceFragment.

Bug: 187306869
Test: verify with Perfetto

Change-Id: Icaa557d1b47a12374298f044e2f9568281589f64

tests/robotests/src/com/android/settings/testutils/shadow/ShadowInteractionJankMonitor.java

@@ -0,0 +1,33 @@
+/*
+ * 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 com.android.settings.testutils.shadow;
+
+import static org.mockito.Mockito.mock;
+
+import com.android.internal.jank.InteractionJankMonitor;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+
+@Implements(InteractionJankMonitor.class)
+public class ShadowInteractionJankMonitor {
+
+    @Implementation
+    public static InteractionJankMonitor getInstance() {
+        return mock(InteractionJankMonitor.class);
+    }
+}