Added ObjC fallbackKey support and updated tests.

5 jobs for stefan/objcFalllbackKey in 2 minutes and 27 seconds (queued for 13 seconds)
Status Name Job ID Coverage
  Build
passed build:lib #29464
docker

00:01:29

 
  Test
passed test:lib #29465
docker

00:00:58

 
  Trigger
passed trigger:android

passed trigger:javascript

passed trigger:python