38567 Add smoke tests to test every commit on a Catalina host. (cla: yes, team)

38575 fix rpc exception for real (cla: yes, tool)

38579 Fix a smoke test. (cla: yes, team)

38586 Don’t reload if compilation has errors (cla: yes, tool)

38587 Improve bitcode check (cla: yes, t: xcode, tool, ⌺‬ platform-ios)

38593 Fix text scale factor for non-content components of Cupertino scaffolds (a: fidelity, cla: yes, f: cupertino, f: material design, framework)

38603 Fix up iOS Add to App tests (a: existing-apps, a: tests, cla: yes, team, ⌺‬ platform-ios)