Roll package:vm_service ^15.0.0

[bkonyi]

No description provided.

[kenzieschmoll]

why does this and stream_channel need to be moved up to dependencies instead of dev_dependencies. From what I can tell they are not used in production code

[bkonyi]

Whoops, these were changes I had made while playing around with the widget preview client. I'll move them back.

[auto-submit]

auto label is removed for flutter/devtools/8628, due to - The status or check suite benchmark-size has failed. Please fix the issues identified (or deflake) before re-applying this label.

• The status or check suite benchmark-performance has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite test_dart2js has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite test_ddc has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite Tool test has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_app integration-test integration_dart2js - dart-cli - shard 1/1 has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite build_dart2js has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_app integration-test integration_dart2js - flutter-web - shard 2/2 has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite build_ddc has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_app integration-test integration_dart2js - flutter-web - shard 1/2 has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite macos goldens test_dart2js has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_extensions integration-test integration_dart2js has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_app integration-test integration_dart2js - flutter - shard 3/3 has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_app integration-test integration_dart2js - flutter - shard 2/3 has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_app integration-test integration_dart2js - flutter - shard 1/3 has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_shared test has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_extensions test has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite devtools_app_shared test has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite main has failed. Please fix the issues identified (or deflake) before re-applying this label.
• The status or check suite Dart Code Metrics has failed. Please fix the issues identified (or deflake) before re-applying this label.