[DNM] Enable Stability Flags on Screen and ComposeScreen

Author: mhiew

workflow-ui/compose/src/main/java/com/squareup/workflow1/ui/compose/ComposeScreen.kt

@@ -1,6 +1,7 @@
 package com.squareup.workflow1.ui.compose
 
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Stable
 import com.squareup.workflow1.ui.Screen
 import com.squareup.workflow1.ui.ViewEnvironment
 import com.squareup.workflow1.ui.ViewRegistry
@@ -73,6 +74,7 @@ import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
  * will be wrapped with the [CompositionRoot]. See the documentation on [CompositionRoot] for
  * more information.
  */
+@Stable
 @WorkflowUiExperimentalApi
 public interface ComposeScreen : Screen {
 

workflow-ui/core-common/build.gradle.kts

@@ -1,12 +1,27 @@
 plugins {
-  id("kotlin-jvm")
+  id("com.android.library")
+  id("kotlin-android")
+  id("android-defaults")
   id("published")
 }
 
+android {
+  buildFeatures.compose = true
+  composeOptions {
+    kotlinCompilerExtensionVersion = libs.versions.androidx.compose.compiler.get()
+  }
+  namespace = "com.squareup.workflow1.ui.compose"
+  testNamespace = "$namespace.test"
+}
+
 dependencies {
+  val composeBom = platform(libs.androidx.compose.bom)
+  implementation(composeBom)
+
   api(libs.kotlin.jdk6)
   api(libs.kotlinx.coroutines.core)
   api(libs.squareup.okio)
+  api(libs.androidx.compose.runtime)
 
   testImplementation(libs.junit)
   testImplementation(libs.kotlin.test.core)

workflow-ui/core-common/src/main/java/com/squareup/workflow1/ui/Screen.kt

@@ -1,7 +1,11 @@
 package com.squareup.workflow1.ui
 
+import androidx.compose.runtime.Stable
+
 /**
  * Marker interface implemented by renderings that map to a UI system's 2d view class.
  */
+
+@Stable
 @WorkflowUiExperimentalApi
 public interface Screen