90304 Migrate iOS project to Xcode 13 compatibility (team, platform-ios, tool, cla: yes, d: examples, waiting for tree to go green, t: xcode)

90642 Migrate Gradle (team, tool, a: accessibility, cla: yes, d: examples, integration_test)

91030 Change project.buildDir in standalone subprojects property (team, tool, a: accessibility, cla: yes, d: examples, waiting for tree to go green, integration_test)

91125 Update outdated platform directories in examples (team, tool, cla: yes, d: examples)

91130 Add example test, update example READMEs (team, cla: yes, d: examples, waiting for tree to go green)