Upgrade to Gradle 8.6 and upgrade plugins

The gradle wrapper was removed from example-oauth because we don't want
to maintain the wrapper copy in each example (at least right now it
doesn't make sense for it to be the only other example to have the
gradle wrapper).

examples/example-hostname/build.gradle

@@ -3,7 +3,7 @@ plugins {
     id 'java'
 
     id "com.google.protobuf" version "0.9.4"
-    id 'com.google.cloud.tools.jib' version '3.3.2' // For releasing to Docker Hub
+    id 'com.google.cloud.tools.jib' version '3.4.1' // For releasing to Docker Hub
 }
 
 repositories {

examples/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

settings.gradle

@@ -1,22 +1,24 @@
 pluginManagement {
     plugins {
         // https://developer.android.com/build/releases/gradle-plugin
-        id "com.android.application" version "7.4.0"
-        id "com.android.library" version "7.4.0"
+        id "com.android.application" version "7.4.1"
+        id "com.android.library" version "7.4.1"
         // https://github.com/johnrengelman/shadow/releases
         id "com.github.johnrengelman.shadow" version "8.1.1"
+	// https://github.com/kt3k/coveralls-gradle-plugin/tags
         id "com.github.kt3k.coveralls" version "2.12.2"
-        // https://github.com/GoogleCloudPlatform/app-gradle-plugin/releases
-        id "com.google.cloud.tools.appengine" version "2.4.5"
+	// https://github.com/GoogleCloudPlatform/appengine-plugins/blob/main/app-gradle-plugin/CHANGELOG.md
+        id "com.google.cloud.tools.appengine" version "2.5.0"
         // https://github.com/GoogleContainerTools/jib/blob/master/jib-gradle-plugin/CHANGELOG.md
-        id "com.google.cloud.tools.jib" version "3.3.2"
+        id "com.google.cloud.tools.jib" version "3.4.1"
+	// https://github.com/google/osdetector-gradle-plugin/tags
         id "com.google.osdetector" version "1.7.3"
         // https://github.com/google/protobuf-gradle-plugin/releases
         id "com.google.protobuf" version "0.9.4"
         // https://github.com/melix/japicmp-gradle-plugin/blob/master/CHANGELOG.txt
-        id "me.champeau.gradle.japicmp" version "0.4.1"
+        id "me.champeau.gradle.japicmp" version "0.4.2"
         // https://github.com/melix/jmh-gradle-plugin/releases
-        id "me.champeau.jmh" version "0.7.1"
+        id "me.champeau.jmh" version "0.7.2"
         // https://github.com/tbroyer/gradle-errorprone-plugin/releases
         id "net.ltgt.errorprone" version "3.1.0"
         // https://github.com/xvik/gradle-animalsniffer-plugin/releases