91267 Migrate protocol_discovery to null safety (tool, cla: yes, waiting for tree to go green, a: null-safety)

91309 Migrate assets, common, icon_tree_shaker to null safety (tool, cla: yes, a: null-safety, tech-debt)

91455 Migrate android build target to null safety (tool, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)

91457 Move DeviceManager into null migrated globals library (tool, cla: yes, a: null-safety, tech-debt)

91516 Migrate crash_reporting and github_template (tool, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)