Add Layout Inflater Interactive Microbenchmark

This allows us to quickly test small changes in layout inflation performance.

TEST: mma &&
      adb install $OUT/system/app/startop_test_app/startop_test_app.apk;
      Run the app
Change-Id: I396157686d1e16ae2a7083a070fe1f622c05b15f

startop/apps/test/Android.bp

@@ -17,6 +17,7 @@
 android_app {
     name: "startop_test_app",
     srcs: [
+        "src/ApplicationBenchmarks.java",
         "src/ComplexLayoutInflationActivity.java",
         "src/CPUIntensiveBenchmarkActivity.java",
         "src/CPUIntensiveBenchmarks.java",

startop/apps/test/src/ApplicationBenchmarks.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2019 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.startop.test;
+
+import android.app.Activity;
+import android.view.LayoutInflater;
+
+final class ApplicationBenchmarks {
+
+    public static final void initializeBenchmarks(Activity parent, BenchmarkRunner benchmarks) {
+        LayoutInflater inflater = LayoutInflater.from(parent);
+
+        benchmarks.addBenchmark("Complex Layout", () -> {
+            inflater.inflate(R.layout.activity_main, null);
+        });
+
+        benchmarks.addBenchmark("TextView List Layout", () -> {
+            inflater.inflate(R.layout.textview_list, null);
+        });
+
+        benchmarks.addBenchmark("FrameLayout List Layout", () -> {
+            inflater.inflate(R.layout.framelayout_list, null);
+        });
+    }
+}

startop/apps/test/src/InteractiveMicrobenchmarkActivity.java

@@ -36,6 +36,8 @@ protected void onCreate(Bundle savedInstanceState) {
         addBenchmark("Empty", () -> {
         });
         addHeader("Application Benchmarks");
+        ApplicationBenchmarks.initializeBenchmarks(this, this);
+        addHeader("CPU Intensive Benchmarks");
         CPUIntensiveBenchmarks.initializeBenchmarks(this, this);
         addHeader("Init Check Overhead Benchmarks");
         InitCheckOverheadBenchmarks.initializeBenchmarks(this, this);