81509 Skip test that is not reliable on device lab (tool, cla: yes)

81512 [flutter_tools] remove mocks, globals from golden comparator and test runner tests

Reland (tool, cla: yes, waiting for tree to go green)

81545 [flutter_tools] android workflow tests migrate from mockito (tool, cla: yes, waiting for tree to go green)

81548 [flutter_tools] remove mocks from android emulator tests (tool, cla: yes, waiting for tree to go green)

81550 [flutter_tools] remove mocks from cold test (tool, cla: yes, waiting for tree to go green)

81554 Add additional logging when devtools cannot launch (tool, cla: yes, waiting for tree to go green)