79501 [flutter_tools] Fix breakage when test main is tagged with @doNotStore (cla: yes, tool, waiting for tree to go green)

79504 Migrate android_studio to null safety (a: null-safety, cla: yes, team, tool, waiting for tree to go green)

79507 Fix import device_port_forwarder typo (cla: yes, tool)

79520 Remove the warning about the Integration Test plugin (cla: yes, team, tool, waiting for tree to go green)

79521 [flutter_tools] Normalize test file paths before using them (cla: yes, tool, waiting for tree to go green)

79525 Migrate analysis to null safety (a: null-safety, cla: yes, team, tool)