format, lint

outsource preview table in several function
revert android compile version

android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 33
+    compileSdkVersion flutter.compileSdkVersion
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -45,7 +45,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "eu.heili.openmediacentermobile"
         minSdkVersion 21
-        targetSdkVersion 30
+        targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

android/build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.6.0'
+    ext.kotlin_version = '1.4.32'
     repositories {
         google()
         mavenCentral()