65199 Eliminate the need for the mockito package in animated_icons_private_test (cla: yes, f: material design, framework, waiting for tree to go green)

65250 Fixed Tooltip widget docs. (cla: yes, f: material design, framework, waiting for tree to go green)

65257 Revert “ScaffoldMessenger” (cla: yes, f: material design, framework)

65273 Revert “Add finders for enableFlutterDriverExtension” (a: tests, cla: yes, framework)

65276 Fix the test error of “Add finders for enableFlutterDriverExtension” and resubmit (a: tests, cla: yes, framework, waiting for tree to go green)