Add CreateLocalVariations to BottupUpMutatorContext.
Add CreateLocalVariations to BottupUpMutatorContext.

Change-Id: I6cc0afae699cf03f84a70e5582cf554642bbd481

google/blueprint,colincross/blueprint,danw/blueprint,yuhangwang/blueprint,Tiger66639/blueprint,colincross/blueprint,google/blueprint,danw/blueprint,Tiger66639/blueprint,yuhangwang/blueprint