upgrade gecko. gradle, deps

packages/flutter_mozilla_components/example/android/app/build.gradle

@@ -1,13 +1,12 @@
 plugins {
     id "com.android.application"
-    id "kotlin-android"
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id "dev.flutter.flutter-gradle-plugin"
 }
 
 android {
     namespace = "eu.weblibre.flutter_mozilla_components_example"
-    compileSdk = flutter.compileSdkVersion
+    compileSdk = 37
     ndkVersion = flutter.ndkVersion
 
     compileOptions {
@@ -15,16 +14,12 @@ android {
         targetCompatibility = JavaVersion.VERSION_17
     }
 
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_17
-    }
-
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId = "eu.weblibre.flutter_mozilla_components_example"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
-        minSdk = flutter.minSdkVersion
+        minSdk = 26
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName
@@ -39,6 +34,12 @@ android {
     }
 }
 
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+    }
+}
+
 flutter {
     source = "../.."
 }