Use Java 21 (#4235)

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
 
       - uses: actions/setup-java@v3
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
 
       - name: Gradle Wrapper Validation

.github/workflows/populate-gradle-build-cache.yml

@@ -17,7 +17,7 @@ jobs:
 
       - uses: actions/setup-java@v3
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
 
       - name: Gradle Wrapper Validation

bitrise.yml

@@ -13,7 +13,7 @@ workflows:
     steps:
     - set-java-version@1:
         inputs:
-          - set_java_version: '17'
+          - set_java_version: '21'
     - activate-ssh-key:
         run_if: '{{getenv "SSH_RSA_PRIVATE_KEY" | ne ""}}'
     - git-clone@8.0: {}

build.gradle

@@ -12,7 +12,7 @@ allprojects {
 
     plugins.withType(JavaBasePlugin).configureEach {
         java {
-            toolchain.languageVersion = JavaLanguageVersion.of(17)
+            toolchain.languageVersion = JavaLanguageVersion.of(21)
         }
     }
 }

settings.gradle

@@ -10,6 +10,10 @@ pluginManagement {
     }
 }
 
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.8.0'
+}
+
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
     repositories {