[chore] updates gradlew, kotlin and AGP.

sets androidx.core to latest possible version for min-sdk 19.
updates backup-api to v1.4.0

app/build.gradle

@@ -3,6 +3,7 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-parcelize'
 
 android {
+    namespace "privacyfriendlyshoppinglist.secuso.org.privacyfriendlyshoppinglist"
     defaultConfig {
         applicationId "privacyfriendlyshoppinglist.secuso.org.privacyfriendlyshoppinglist"
         minSdkVersion 19
@@ -122,7 +123,7 @@ dependencies {
     implementation "androidx.work:work-runtime-ktx:$work_version"
     androidTestImplementation "androidx.work:work-testing:$work_version"
 
-    implementation "androidx.core:core-ktx:$kotlin_version"
+    implementation "androidx.core:core-ktx:1.9.0"
 
     // Multi-Dex
     def multidex_version = "2.0.1"

build.gradle

@@ -6,9 +6,9 @@ buildscript {
         google()
     }
 
-    ext.kotlin_version = "1.9.10"
+    ext.kotlin_version = "2.0.21"
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.1.4'
+        classpath 'com.android.tools.build:gradle:8.3.2'
         classpath 'me.tatarka:gradle-retrolambda:3.2.5'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Mon Dec 09 15:57:39 CET 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists