Update build.gradle

Author: JDDV

android/build.gradle

@@ -22,15 +22,15 @@ rootProject.allprojects {
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion flutter.compileSdkVersion
+    compileSdkVersion 31
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
     defaultConfig {
-    minSdkVersion flutter.minSdkVersion
+    minSdkVersion 16
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     lintOptions {