add base

Author: code3-dev

android/app/build.gradle.kts

@@ -39,7 +39,7 @@ android {
 
     defaultConfig {
         applicationId = "com.pira.omid"
-        minSdk = flutter.minSdkVersion
+        minSdk = 21
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName