add Java 25 to testing matrix

.github/workflows/testing.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        jre: [8, 11, 17, 21]
+        jre: [8, 11, 17, 21, 25]
       fail-fast: false # Should swap to true if we grow a large matrix
 
     steps:

buildSrc/src/main/java/io/grpc/gradle/CheckForUpdatesTask.java

@@ -49,6 +49,7 @@
 public abstract class CheckForUpdatesTask extends DefaultTask {
   private final Set<Library> libraries;
 
+  @SuppressWarnings("this-escape", "deprecation")
   @Inject
   public CheckForUpdatesTask(Configuration updateConf, String catalog, RegularFile commentFile)
       throws IOException {

buildSrc/src/main/java/io/grpc/gradle/CheckPackageLeakageTask.java

@@ -31,6 +31,7 @@
 
 /** Verifies all class files within jar files are in a specified Java package. */
 public abstract class CheckPackageLeakageTask extends DefaultTask {
+  @SuppressWarnings("this-escape")
   public CheckPackageLeakageTask() {
     // Fake output for UP-TO-DATE checking
     getOutputs().file(getProject().getLayout().getBuildDirectory().file("tmp/" + getName()));

buildSrc/src/main/java/io/grpc/gradle/RequireUpperBoundDepsMatchTask.java

@@ -46,6 +46,7 @@ public abstract class RequireUpperBoundDepsMatchTask extends DefaultTask {
   private final String projectPath;
   private final String projectVersion;
 
+  @SuppressWarnings("this-escape")
   public RequireUpperBoundDepsMatchTask() {
     projectPath = getProject().getPath();
     projectVersion = getProject().getVersion().toString();

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.2.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME