28809 fix some formatting issues (cla: yes, framework, team)

28821 [fuchsia] Permit relative entries to the fuchsia_tester (cla: yes, tool)

28845 [Material] Fix radio ink ripple to be centered (cla: yes, f: material design, framework)

28852 Update macOS version in tests (a: tests, cla: yes, team)

28855 Move material iOS back swipe test to material (cla: yes, f: cupertino, framework)

28857 Form Snippet for API Docs (cla: yes, d: api docs, d: examples, framework)

28863 Fall-back to platform tools in Android SDK detection logic. (cla: yes, tool, waiting for tree to go green)