java: bump java protobuf version and lock netty version at 4.1.68

GitOrigin-RevId: eb8ffa4e3a144f6798b0f5a8762a2904c6f4afdc

build.gradle

@@ -6,8 +6,8 @@ plugins {
     id 'signing'
 }
 
-def grpcVersion = '1.42.2'
-def protobufVersion = '3.19.6'
+def grpcVersion = '1.43.2'
+def protobufVersion = '3.21.7'
 def protocVersion = protobufVersion
 def jsonVersion = '20190722'
 def releaseVersion = System.getenv('JAVA_SDK_VERSION')
@@ -42,6 +42,10 @@ dependencies {
     implementation "io.grpc:grpc-protobuf:${grpcVersion}"
     implementation "io.grpc:grpc-stub:${grpcVersion}"
     implementation "io.grpc:grpc-netty:${grpcVersion}"
+
+    // locking this version down due to a cve
+    implementation "io.netty:netty-codec-http2:4.1.68.Final"
+
     implementation "org.json:json:${jsonVersion}"
     compileOnly "javax.annotation:javax.annotation-api:1.2"
 }