feat(perf): add benchmark build type for accurate startup measurements

Add non-debuggable 'benchmark' build type to the app, allowing the
macrobenchmark module to measure startup without debuggable overhead
and with baseline profile installation support.

Author: bmc08gt

apps/flipcash/app/build.gradle.kts

@@ -84,6 +84,12 @@ android {
                 )
             }
         }
+        create("benchmark") {
+            initWith(getByName("debug"))
+            isDebuggable = false
+            signingConfig = signingConfigs.getByName("contributors")
+            matchingFallbacks += listOf("debug")
+        }
     }
 
     compileOptions {

apps/flipcash/benchmark/build.gradle.kts

@@ -12,8 +12,7 @@ android {
         minSdk = 29
         targetSdk = libs.versions.android.targetSdk.get().toInt()
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
-        testInstrumentationRunnerArguments["androidx.benchmark.suppressErrors"] =
-            "EMULATOR,DEBUGGABLE"
+        testInstrumentationRunnerArguments["androidx.benchmark.suppressErrors"] = "EMULATOR"
     }
 
     signingConfigs {
@@ -26,8 +25,10 @@ android {
     }
 
     buildTypes {
-        debug {
+        create("benchmark") {
+            isDebuggable = true
             signingConfig = signingConfigs.getByName("contributors")
+            matchingFallbacks += listOf("debug")
         }
     }
 

apps/flipcash/benchmark/src/main/kotlin/com/flipcash/benchmark/StartupBenchmark.kt

@@ -29,12 +29,10 @@ class StartupBenchmark {
         )
     )
 
-    // Requires a non-debuggable (release/benchmark) build to install the baseline profile.
-    // Add a 'benchmark' buildType to the app module to enable this test.
-    // @Test
-    // fun startupBaselineProfile() = benchmark(
-    //     CompilationMode.Partial(baselineProfileMode = BaselineProfileMode.Require)
-    // )
+    @Test
+    fun startupBaselineProfile() = benchmark(
+        CompilationMode.Partial(baselineProfileMode = BaselineProfileMode.Require)
+    )
 
     @Test
     fun startupFullCompilation() = benchmark(CompilationMode.Full())