Remove use of bare Immutable{List,Map,Set} Builder classes.

Always use the more-qualified class name for clarity at the site of use. There are too many classes named Builder.

PiperOrigin-RevId: 193649193
GitOrigin-RevId: 96d3c91c714544584c9174759bedebf2a6be5e71
Change-Id: I0c9cf0ab619bc743cd15ba63ad7355e008c0f1d1
2 files changed
tree: e035024479e1419e2a17a06ed35b9d566b60a0e1
  1. java/
  2. test/