Make project compatible with Gradle 8.x and Android Gradle Plugin 8.x

Those changes required if you want too use project as included build for an app which already uses AGP 8. So it allows to debug or experiment with Amplitude SDK as part of your own project

- Update Kotlin 1.9.0 and AGP 8.1.0, Gradle 8.2.1
- Removed fat-aar because it's not compatible with AGP 8 (see kezong/fat-aar-android#409), so no dependencies packaging into single AAR anymore, it affects publishing, but doesn't affect if repo used as included build
- Fix incompatibility with AGP 8 DSL: added namepaces, enabled required buildFeatures

android/build.gradle

@@ -1,7 +1,6 @@
 plugins {
     id 'com.android.library'
     id 'kotlin-android'
-    id 'com.kezong.fat-aar'
 }
 
 ext {
@@ -17,6 +16,8 @@ version = PUBLISH_VERSION
 
 android {
     compileSdk 31
+    buildFeatures.buildConfig = true
+    namespace = "com.amplitude.android"
 
     defaultConfig {
         multiDexEnabled true
@@ -52,12 +53,12 @@ android {
 }
 
 dependencies {
-    embed project(':common')
-    embed project(':common-jvm')
-    embed project(':common-android')
-    embed project(':core')
-    embed project(':event-bridge')
-    embed project(':id')
+    implementation project(':common')
+    implementation project(':common-jvm')
+    implementation project(':common-android')
+    implementation project(':core')
+    implementation project(':event-bridge')
+    implementation project(':id')
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.2'
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.2'
     implementation 'com.amplitude:analytics-connector:1.0.0'

build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = "1.5.10"
+    ext.kotlin_version = "1.9.0"
     ext.dokka_version = '1.6.10'
     repositories {
         maven { url "https://plugins.gradle.org/m2/" }
@@ -8,13 +8,12 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.4'
+        classpath 'com.android.tools.build:gradle:8.1.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "org.jetbrains.dokka:dokka-gradle-plugin:$dokka_version"
         classpath "org.jlleitschuh.gradle:ktlint-gradle:10.2.1"
         classpath "io.github.gradle-nexus:publish-plugin:1.1.0"
         classpath "de.mannodermaus.gradle.plugins:android-junit5:1.8.2.1"
-        classpath 'com.github.kezong:fat-aar:1.3.8'
     }
 }
 

common-android/build.gradle

@@ -5,6 +5,7 @@ plugins {
 }
 
 android {
+    namespace = "com.amplitude.common.android"
     compileSdk 31
 
     defaultConfig {

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

samples/java-android-app/build.gradle

@@ -7,7 +7,9 @@ ext {
 }
 
 android {
+    namespace = "com.amplitude.android.sample"
     compileSdk 31
+    buildFeatures.buildConfig = true
 
     defaultConfig {
         applicationId "com.amplitude.android.sample"

samples/kotlin-android-app/build.gradle

@@ -8,7 +8,9 @@ ext {
 }
 
 android {
+    namespace = "com.amplitude.android.sample"
     compileSdk 31
+    buildFeatures.buildConfig = true
 
     defaultConfig {
         applicationId "com.amplitude.android.sample"