Update default_java_toolchain.bzl to match Bazel@head version.

[comius]

Fixes #57

[jpsim]

This appears to work in my local testing in the project that surfaced the error I described in #57. I'll continue to do more in-depth testing but so far so good.

Thanks for the super fast response @comius!

[jpsim]

Actually I am seeing some "indirect dependency" errors in my project now, similar to the errors that have failed the CI jobs on this PR:

bazel-out/darwin_arm64-opt-exec-2B5CBBC6/bin/external/bazel_tools/src/main/protobuf/_javac/worker_protocol_proto/libworker_protocol_proto-speed_tmp/com/google/devtools/build/lib/worker/WorkerProtocol.java:9: error: [strict] Using type com.google.protobuf.ExtensionRegistryLite from an indirect dependency (TOOL_INFO: "@com_google_protobuf//java/core:lite_runtime_only"). See command below **
      com.google.protobuf.ExtensionRegistryLite registry) {
                         ^
bazel-out/darwin_arm64-opt-exec-2B5CBBC6/bin/external/bazel_tools/src/main/protobuf/_javac/worker_protocol_proto/libworker_protocol_proto-speed_tmp/com/google/devtools/build/lib/worker/WorkerProtocol.java:13: error: [strict] Using type com.google.protobuf.ExtensionRegistry from an indirect dependency (TOOL_INFO: "@com_google_protobuf//java/core"). See command below **
      com.google.protobuf.ExtensionRegistry registry) {
                         ^
bazel-out/darwin_arm64-opt-exec-2B5CBBC6/bin/external/bazel_tools/src/main/protobuf/_javac/worker_protocol_proto/libworker_protocol_proto-speed_tmp/com/google/devtools/build/lib/worker/WorkerProtocol.java:32: error: [strict] Using type java.lang.String from an indirect dependency (TOOL_INFO: "/private/var/tmp/_bazel_jsimard/7140f038a5c13b01a171c93151a000da/execroot/envoy_mobile/bazel-out/darwin_arm64-opt-exec-2B5CBBC6/bin/external/rules_java/toolchains/platformclasspath.jar").
    java.lang.String getPath();
             ^
 ** Please add the following dependencies: 
  @com_google_protobuf//java/core @com_google_protobuf//java/core:lite_runtime_only to @bazel_tools//src/main/protobuf:worker_protocol_proto 
 ** You can use the following buildozer command: 
buildozer 'add deps @com_google_protobuf//java/core @com_google_protobuf//java/core:lite_runtime_only' @bazel_tools//src/main/protobuf:worker_protocol_proto 

[jpsim]

And there appears to be a second error as well regarding runtime_toolchain_type that I also see with bazel 6.0.0-pre.20220608.2 only with this branch:

No matching toolchains found for types @bazel_tools//tools/jdk:runtime_toolchain_type.