74932 Allow ‘flutter create’ in dev and example directories (cla: yes, tool, waiting for tree to go green)

74937 [flutter_releases] Flutter 1.26.0-17.1.pre Dev - Revert vm_service, other packages from pub roll (a: tests, cla: yes, f: cupertino, f: material design, framework, team, tool)

74943 vm_service 6.0.1-nullsafety.1, dwds 8.0.2 (cla: yes, team, tool, waiting for tree to go green)

74946 Replace MockUsage with TestUsage (cla: yes, team, tool, waiting for tree to go green)

74956 Replace MockProcessManager with FakeProcessManager in cocoapods_test (cla: yes, team, tool)