Fix tutorial Android app build (facebook#1676)

Summary:
This was not updated with the recent Litho editor changes.

Pull Request resolved: facebook#1676

Test Plan:
`./gradlew :tutorial:installDebug`

<img width="1381" alt="Screenshot 2020-11-13 at 16 31 16" src="https://user-images.githubusercontent.com/9906/99096159-e1197f00-25cd-11eb-9a80-9697fc7e4e3b.png">

Reviewed By: mweststrate

Differential Revision: D24981566

Pulled By: passy

fbshipit-source-id: 8315fe67f80c36b570c0c8fa110f810ad31bd9f2

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/TutorialApplication.kt

@@ -10,15 +10,12 @@ package com.facebook.flipper.sample.tutorial
 import android.app.Application
 import com.facebook.drawee.backends.pipeline.Fresco
 import com.facebook.flipper.android.AndroidFlipperClient
-import com.facebook.flipper.core.FlipperClient
 import com.facebook.flipper.plugins.fresco.FrescoFlipperPlugin
 import com.facebook.flipper.plugins.inspector.DescriptorMapping
 import com.facebook.flipper.plugins.inspector.InspectorFlipperPlugin
-import com.facebook.flipper.plugins.litho.LithoFlipperDescriptors
 import com.facebook.flipper.sample.tutorial.plugin.SeaMammalFlipperPlugin
 import com.facebook.litho.config.ComponentsConfiguration
-import com.facebook.litho.sections.config.SectionsConfiguration
-import com.facebook.litho.widget.SectionsDebug
+import com.facebook.litho.editor.flipper.LithoFlipperDescriptors
 import com.facebook.soloader.SoLoader
 
 class TutorialApplication : Application() {