Fix tutorial fileTemplates

Our templates were out of date, and our `install.sh` script doesn't work any more.
Replaced with an IDE-produced zip file that the IDE is willing to import.

Replaces `Layout Runner (ViewBinding)` with `Android Screen (ViewBinding)`:

```kotlin
package ${PACKAGE_NAME}

import com.squareup.workflow1.ui.AndroidScreen
import com.squareup.workflow1.ui.ScreenViewFactory
import com.squareup.workflow1.ui.ScreenViewFactory.Companion.fromViewBinding
import com.squareup.workflow1.ui.ScreenViewRunner
import com.squareup.workflow1.ui.ViewEnvironment
import com.squareup.workflow1.ui.WorkflowUiExperimentalApi

@OptIn(WorkflowUiExperimentalApi::class)
data class $Name(
  // TODO: add properties needed to update $VIEW_BINDING_TYPE
) : AndroidScreen<$Name> {

  override val viewFactory =
    ScreenViewFactory.fromViewBinding($VIEW_BINDING_TYPE::inflate, ::${Name}Runner)
}

@OptIn(WorkflowUiExperimentalApi::class)
private class ${Name}Runner(
  private val viewBinding: $VIEW_BINDING_TYPE
) : ScreenViewRunner<$Name> {

  override fun showRendering(
    rendering: $Name,
    environment: ViewEnvironment
  ) {
    TODO("Update viewBinding from rendering")
  }
}
```

README-templates.md

@@ -0,0 +1,8 @@
+# File Templates
+
+`workflow-file-templates.zip` can be imported into Android Studio / IntelliJ IDEA to add a few Workflow-specific file templates, via _File > Manage IDE Settings > Import Settings…_.
+
+To update the templates:
+
+ * edit them in the IDE (_Settings > Editor > File and Code Templates_)
+ * export them (_File > Manage IDE Settings > Import Settings…_), taking care to clear every checkbox except that for File Templates.

samples/tutorial/tutorial-final/src/main/java/workflow/tutorial/TodoEditScreen.kt

@@ -2,8 +2,12 @@ package workflow.tutorial
 
 import com.squareup.workflow1.ui.AndroidScreen
 import com.squareup.workflow1.ui.ScreenViewFactory
+import com.squareup.workflow1.ui.ScreenViewRunner
 import com.squareup.workflow1.ui.TextController
+import com.squareup.workflow1.ui.ViewEnvironment
 import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
+import com.squareup.workflow1.ui.control
+import com.squareup.workflow1.ui.navigation.setBackHandler
 import workflow.tutorial.views.databinding.TodoEditViewBinding
 
 @OptIn(WorkflowUiExperimentalApi::class)
@@ -19,3 +23,19 @@ data class TodoEditScreen(
   override val viewFactory =
     ScreenViewFactory.fromViewBinding(TodoEditViewBinding::inflate, ::TodoEditScreenRunner)
 }
+
+@OptIn(WorkflowUiExperimentalApi::class)
+private class TodoEditScreenRunner(
+  private val binding: TodoEditViewBinding
+) : ScreenViewRunner<TodoEditScreen> {
+
+  override fun showRendering(
+    rendering: TodoEditScreen,
+    environment: ViewEnvironment
+  ) {
+    binding.root.setBackHandler(rendering.onBackPressed)
+    binding.save.setOnClickListener { rendering.onSavePressed() }
+    rendering.title.control(binding.todoTitle)
+    rendering.note.control(binding.todoNote)
+  }
+}

samples/tutorial/tutorial-final/src/main/java/workflow/tutorial/TodoListScreen.kt

@@ -1,8 +1,13 @@
 package workflow.tutorial
 
+import androidx.recyclerview.widget.LinearLayoutManager
 import com.squareup.workflow1.ui.AndroidScreen
 import com.squareup.workflow1.ui.ScreenViewFactory
+import com.squareup.workflow1.ui.ScreenViewRunner
+import com.squareup.workflow1.ui.ViewEnvironment
 import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
+import com.squareup.workflow1.ui.navigation.setBackHandler
+import workflow.tutorial.views.TodoListAdapter
 import workflow.tutorial.views.databinding.TodoListViewBinding
 
 /**
@@ -22,3 +27,33 @@ data class TodoListScreen(
   override val viewFactory =
     ScreenViewFactory.fromViewBinding(TodoListViewBinding::inflate, ::TodoListScreenRunner)
 }
+
+@OptIn(WorkflowUiExperimentalApi::class)
+private class TodoListScreenRunner(
+  private val todoListBinding: TodoListViewBinding
+) : ScreenViewRunner<TodoListScreen> {
+
+  private val adapter = TodoListAdapter()
+
+  init {
+    todoListBinding.todoList.layoutManager = LinearLayoutManager(todoListBinding.root.context)
+    todoListBinding.todoList.adapter = adapter
+  }
+
+  override fun showRendering(
+    rendering: TodoListScreen,
+    environment: ViewEnvironment
+  ) {
+    todoListBinding.root.setBackHandler(rendering.onBackPressed)
+    todoListBinding.add.setOnClickListener { rendering.onAddPressed() }
+
+    with(todoListBinding.todoListWelcome) {
+      text =
+        resources.getString(workflow.tutorial.views.R.string.todo_list_welcome, rendering.username)
+    }
+
+    adapter.todoList = rendering.todoTitles
+    adapter.onTodoSelected = rendering.onRowPressed
+    adapter.notifyDataSetChanged()
+  }
+}

samples/tutorial/tutorial-final/src/main/java/workflow/tutorial/WelcomeScreen.kt

@@ -2,8 +2,11 @@ package workflow.tutorial
 
 import com.squareup.workflow1.ui.AndroidScreen
 import com.squareup.workflow1.ui.ScreenViewFactory
+import com.squareup.workflow1.ui.ScreenViewRunner
 import com.squareup.workflow1.ui.TextController
+import com.squareup.workflow1.ui.ViewEnvironment
 import com.squareup.workflow1.ui.WorkflowUiExperimentalApi
+import com.squareup.workflow1.ui.control
 import workflow.tutorial.views.databinding.WelcomeViewBinding
 
 @OptIn(WorkflowUiExperimentalApi::class)
@@ -13,6 +16,23 @@ data class WelcomeScreen(
   /** Callback when the login button is tapped. */
   val onLogInPressed: () -> Unit
 ) : AndroidScreen<WelcomeScreen> {
+
   override val viewFactory =
     ScreenViewFactory.fromViewBinding(WelcomeViewBinding::inflate, ::WelcomeScreenRunner)
 }
+
+@OptIn(WorkflowUiExperimentalApi::class)
+private class WelcomeScreenRunner(
+  private val viewBinding: WelcomeViewBinding
+) : ScreenViewRunner<WelcomeScreen> {
+
+  override fun showRendering(
+    rendering: WelcomeScreen,
+    environment: ViewEnvironment
+  ) {
+    // TextController is a helper provided by the workflow library that takes
+    // care of the complexity of correctly interacting with EditTexts in a declarative manner.
+    rendering.username.control(viewBinding.username)
+    viewBinding.login.setOnClickListener { rendering.onLogInPressed() }
+  }
+}