7484 Reland “Add elevation and thickness to SemanticsNode (#7282)” (accessibility, cla: yes)

7485 Execute Picture.toImage on the current thread in the test environment (cla: yes)

7488 Implemented Dark Mode for Android (#25525) (cla: yes)

7492 Cleanup Dart sticky errors API and roll tonic to 4634b29a24ccfc0fcfafcc8196ef30131185ad88 (cla: yes)

7493 Add runttime unittest that loads and runs an isolate from the kernel. (cla: yes)

7495 Add unittest that runs Dart code synchronously. (cla: yes)

7496 Validate dynamic patches before attempting to install (cla: yes)