Adjustments for Gradle 8 build environment.

Gradle 8 requires JDK version 11.
Update build class path to pick up new Gradle version.

app/build.gradle.kts

@@ -36,8 +36,8 @@ androidGitVersion {
 
 android {
   compileOptions {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
   }
 
   namespace = "audio.funkwhale.ffa"
@@ -47,7 +47,7 @@ android {
   }
 
   kotlinOptions {
-    jvmTarget = JavaVersion.VERSION_11.toString()
+    jvmTarget = JavaVersion.VERSION_17.toString()
   }
 
   buildFeatures {

build.gradle.kts

@@ -13,7 +13,7 @@ buildscript {
   val navVersion: String by extra
 
   dependencies {
-    classpath("com.android.tools.build:gradle:7.4.2")
+    classpath("com.android.tools.build:gradle:8.1.2")
     classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.20")
     classpath("com.github.bjoernq:unmockplugin:0.7.9")
     classpath("com.github.ben-manes:gradle-versions-plugin:0.46.0")

gradle.properties

@@ -4,3 +4,6 @@ kotlin.code.style=official
 
 android.useAndroidX=true
 android.enableJetifier=true
+android.defaults.buildfeatures.buildconfig=true
+android.nonTransitiveRClass=false
+android.nonFinalResIds=false