91705 Migrate desktop_device to null safety (tool, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)

91719 Bump targetSdkVersion to 31 and organize static values (team, tool, a: accessibility, cla: yes, d: api docs, d: examples, documentation, integration_test)

91754 Revert “Reland “Enable caching of CPU samples collected at application startup (#89600)”” (tool, cla: yes)

91789 Improve error message for when you’re not running chromedriver (tool, cla: yes, waiting for tree to go green)

91791 Revert “Add multidex flag and automatic multidex support” (tool, cla: yes)