Revert "Move rewritten StringFactory call results into dex registers for deopt"

This reverts commit 8ca33bf04060fadd5b35fa93fa56547c62fe52e7.

597-deopt-new-string is failing.

Bug: 28846692
Bug: 28555675
Change-Id: Ibfb59ec36e089c987ea64e4af4ca3709e536412a
4 files changed