74065 No test core (cla: yes, team)

74077 Expand Stack fix to more exporting libraries (cla: yes, f: cupertino, f: material design, framework, team, waiting for tree to go green)

74080 Add verbose build flag to ios_app_with_extensions_test (a: tests, cla: yes, team)

74109 Add tracing test to check default streams (cla: yes, team)

74171 Roll package:dds to 1.7.2 (cla: yes, team)

74215 Use package:vm_service instead of json_rpc_2 (cla: yes, team, tool)

74272 Roll package:dds to 1.7.3 and add error handling for VM service disappearing (cla: yes, team, tool)