feat: Upgrade Android Gradle tools and set Java 11

Upgrades the Android Gradle Plugin from 7.4.2 to 8.5.1 and the Gradle wrapper from 8.12 to 8.13.

Sets the Java compatibility to version 11 in the Android build configuration.

Fixed: #1888

Author: vicajilau

android/build.gradle

@@ -11,7 +11,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.2'
+        classpath 'com.android.tools.build:gradle:8.5.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -38,6 +38,11 @@ android {
         disable 'InvalidPackage'
     }
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
+    }
+    
     dependencies {
         implementation 'androidx.core:core:1.15.0'
         implementation 'androidx.annotation:annotation:1.9.1'

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-all.zip

example/android/settings.gradle.kts

@@ -19,7 +19,7 @@ pluginManagement {
 
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "8.9.1" apply false
+    id("com.android.application") version "8.13.1" apply false
     id("org.jetbrains.kotlin.android") version "2.1.0" apply false
 }