Remove unused experimental opt-ins

The following experimental APIs have been stabilized:
- `ExperimentalComposeUiApi` for `testTag` and `semantics`
- `ExperimentalMetricApi` for `FrameTimingMetric`

Author: AjeshRPai

MacrobenchmarkSample/app/src/main/kotlin/com/example/macrobenchmark/target/activity/FullyDrawnStartupActivity.kt

@@ -20,6 +20,7 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.ReportDrawnWhen
 import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
 import androidx.activity.viewModels
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -39,6 +40,7 @@ class FullyDrawnStartupActivity : ComponentActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
         setContent {
             MaterialTheme {
                 Box {

MacrobenchmarkSample/app/src/main/kotlin/com/example/macrobenchmark/target/activity/MainActivity.kt

@@ -32,7 +32,6 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.semantics.semantics
@@ -58,7 +57,7 @@ private const val TAG = "MainActivity"
 
 class MainActivity : ComponentActivity() {
 
-    @OptIn(ExperimentalComposeUiApi::class, ExperimentalMaterial3Api::class)
+    @OptIn(ExperimentalMaterial3Api::class)
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContent {

MacrobenchmarkSample/app/src/main/kotlin/com/example/macrobenchmark/target/activity/clicklatency/ComposeActivity.kt

@@ -50,7 +50,6 @@ import androidx.tracing.trace
 import com.example.macrobenchmark.target.recyclerview.Entry
 import com.example.macrobenchmark.target.util.ClickTrace
 
-@OptIn(ExperimentalComposeUiApi::class)
 class ComposeActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

MacrobenchmarkSample/app/src/main/kotlin/com/example/macrobenchmark/target/activity/login/LoginActivity.kt

@@ -55,7 +55,6 @@ import com.example.macrobenchmark.target.activity.MainActivity
 import com.example.macrobenchmark.target.util.SampleViewModel
 import kotlinx.coroutines.launch
 
-@OptIn(ExperimentalComposeUiApi::class)
 class LoginActivity : ComponentActivity() {
 
     private val sampleViewModel by viewModels<SampleViewModel>()

MacrobenchmarkSample/macrobenchmark/src/main/kotlin/com/example/macrobenchmark/benchmark/frames/NestedRecyclerFrameTimingBenchmarks.kt

@@ -16,7 +16,6 @@
 
 package com.example.macrobenchmark.benchmark.frames
 
-import androidx.benchmark.macro.ExperimentalMetricApi
 import androidx.benchmark.macro.FrameTimingMetric
 import androidx.benchmark.macro.StartupMode
 import androidx.benchmark.macro.junit4.MacrobenchmarkRule
@@ -32,7 +31,6 @@ import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
 
-@ExperimentalMetricApi
 @LargeTest
 @RunWith(AndroidJUnit4::class)
 class NestedRecyclerFrameTimingBenchmarks {

MacrobenchmarkSample/macrobenchmark/src/main/kotlin/com/example/macrobenchmark/benchmark/startup/FullyDrawnStartupBenchmark.kt

@@ -47,7 +47,7 @@ class FullyDrawnStartupBenchmark {
             startIntent(Intent("$TARGET_PACKAGE.FULLY_DRAWN_STARTUP_ACTIVITY"))
 
             // Waits for an element that corresponds to fully drawn state
-            onElement { textAsString() == "Fully Drawn" && isVisibleToUser }
+            onElement { textAsString() == "Fully Drawn" }
         }
     }
 }