Add optional parameter extraEdges to AbstractModuleLoader.loadModules
Add optional parameter extraEdges to AbstractModuleLoader.loadModules

RELNOTES[NEW]: goog.module.AbstractModuleLoader extraEdges has been added as an optional parameter to the loadModules method.

PiperOrigin-RevId: 308089373

google/closure-library,google/closure-library,google/closure-library,google/closure-library,google/closure-library