Add Compose test to check that FocusRequester is initialized

This adds the test case surfaced in robolectric#9703, where the `FocusRequester` might not be initialized.

integration_tests/composeui/src/test/java/org/robolectric/integrationtests/composeui/FocusRequesterTest.kt

@@ -0,0 +1,34 @@
+package org.robolectric.integrationtests.composeui
+
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.test.junit4.createComposeRule
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+
+@RunWith(RobolectricTestRunner::class)
+class FocusRequesterTest {
+  @get:Rule val composeTestRule = createComposeRule()
+
+  /** Test for https://github.com/robolectric/robolectric/issues/9703 */
+  @Test
+  fun `check FocusRequester is initialized`() {
+    composeTestRule.setContent {
+      val focusRequester = rememberFocusRequester()
+
+      TextField(value = "", onValueChange = {}, modifier = Modifier.focusRequester(focusRequester))
+    }
+  }
+
+  @Composable
+  private fun rememberFocusRequester(): FocusRequester {
+    return remember { FocusRequester() }.apply { LaunchedEffect(this) { requestFocus() } }
+  }
+}