[TF2XLA] Keep special case optimizations in the tile op.
[TF2XLA] Keep special case optimizations in the tile op.

PiperOrigin-RevId: 218627789

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li9jan/tensorflow,DavidNorman/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,dongjoon-hyun/tensorflow,Bismarrck/tensorflow,theflofly/tensorflow,tensorflow/tensorflow-pywrap_saved_model,asimshankar/tensorflow,ghchinoy/tensorflow,frreiss/tensorflow-fred,theflofly/tensorflow,jhseu/tensorflow,hehongliang/tensorflow,asimshankar/tensorflow,annarev/tensorflow,annarev/tensorflow,freedomtan/tensorflow,apark263/tensorflow,petewarden/tensorflow,adit-chandra/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Intel-tensorflow/tensorflow,yongtang/tensorflow,gautam1858/tensorflow,chemelnucfin/tensorflow,theflofly/tensorflow,Intel-tensorflow/tensorflow,karllessard/tensorflow,davidzchen/tensorflow,kevin-coder/tensorflow-fork,gautam1858/tensorflow,Intel-Corporation/tensorflow,frreiss/tensorflow-fred,asimshankar/tensorflow,alsrgv/tensorflow,DavidNorman/tensorflow,jendap/tensorflow