Fix SDK version

navigationdrawertest/build.gradle

@@ -2,14 +2,12 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 android {
-    compileSdkVersion 30
-
-
+    compileSdkVersion ANDROID_COMPILE_SDK
 
     defaultConfig {
         applicationId "com.frostnerd.navigationdrawertest"
-        minSdkVersion 21
-        targetSdkVersion 30
+        minSdkVersion ANDROID_MIN_SDK
+        targetSdkVersion ANDROID_COMPILE_SDK
         versionCode 1
         versionName "1.0"