fix: AGP 8.x compatibility + Flutter 3.24

@mvarendorff2 @JohnGalt1717
#183 #172

Author: petrleocompel

cryptography_flutter/android/build.gradle

@@ -2,15 +2,15 @@ group 'dev.dint.cryptography_flutter'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.7.10'
+    ext.kotlin_version = "1.7.10"
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.0'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath("com.android.tools.build:gradle:8.5.0")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version")
     }
 }
 
@@ -25,8 +25,10 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 31
-
+    if (project.android.hasProperty("namespace")) {
+        namespace = "dev.dint.cryptography_flutter"
+    }
+    compileSdk 34
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
@@ -43,9 +45,9 @@ android {
     defaultConfig {
         minSdkVersion 21
     }
-}
 
-dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "androidx.security:security-crypto:1.1.0-alpha05"
-}
+    dependencies {
+        testImplementation("org.jetbrains.kotlin:kotlin-test")
+        testImplementation("org.mockito:mockito-core:5.0.0")
+    }
+}

cryptography_flutter/android/gradle.properties

@@ -1,4 +1,3 @@
-org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
+org.gradle.jvmargs=-Xmx4G
 android.useAndroidX=true
 android.enableJetifier=true