Setup Baseline Profile (#8135)

* Setup Baseline Profile

Adds Baseline Profile generator and startup time test.
Readme included in macrobenchmark module to run the generator.

* changes

macrobenchmark/build.gradle.kts

@@ -0,0 +1,52 @@
+plugins {
+    id("com.android.test")
+    kotlin("android")
+}
+
+android {
+    namespace = "tachiyomi.macrobenchmark"
+    compileSdk = AndroidConfig.compileSdk
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
+
+    defaultConfig {
+        minSdk = AndroidConfig.minSdk
+        targetSdk = AndroidConfig.targetSdk
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        // This benchmark buildType is used for benchmarking, and should function like your
+        // release build (for example, with minification on). It's signed with a debug key
+        // for easy local/CI testing.
+        create("benchmark") {
+            isDebuggable = true
+            signingConfig = getByName("debug").signingConfig
+            matchingFallbacks += listOf("release")
+        }
+    }
+
+    targetProjectPath = ":app"
+    experimentalProperties["android.experimental.self-instrumenting"] = true
+}
+
+dependencies {
+    implementation(androidx.test.ext)
+    implementation(androidx.test.espresso.core)
+    implementation(androidx.test.uiautomator)
+    implementation(androidx.benchmark.macro)
+}
+
+androidComponents {
+    beforeVariants(selector().all()) {
+        it.enable = it.buildType == "benchmark"
+    }
+}