Add automated baseline profile generation (#1349)

* Add automated baseline profile generation

* Create benchmark build type

And remove the `enabledRules` argument as it will be injected by
baseline profile gradle plugin.

benchmark/src/main/java/com/ehviewer/baselineprofile/StartupBenchmarks.kt

@@ -0,0 +1,44 @@
+package com.ehviewer.baselineprofile
+
+import androidx.benchmark.macro.BaselineProfileMode
+import androidx.benchmark.macro.CompilationMode
+import androidx.benchmark.macro.StartupMode
+import androidx.benchmark.macro.StartupTimingMetric
+import androidx.benchmark.macro.junit4.MacrobenchmarkRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class StartupBenchmarks {
+
+    @get:Rule
+    val rule = MacrobenchmarkRule()
+
+    @Test
+    fun startupCompilationNone() =
+        benchmark(CompilationMode.None())
+
+    @Test
+    fun startupCompilationBaselineProfiles() =
+        benchmark(CompilationMode.Partial(BaselineProfileMode.Require))
+
+    private fun benchmark(compilationMode: CompilationMode) {
+        rule.measureRepeated(
+            packageName = InstrumentationRegistry.getArguments().getString("targetAppId")
+                ?: throw Exception("targetAppId not passed as instrumentation runner arg"),
+            metrics = listOf(StartupTimingMetric()),
+            compilationMode = compilationMode,
+            startupMode = StartupMode.COLD,
+            iterations = 10,
+            setupBlock = {
+                pressHome()
+            },
+            measureBlock = {
+                startActivityAndWait()
+            },
+        )
+    }
+}