Move CreateFIFO() and RedirectStream() from testing/android/ to base/android/.

They will be used by content_shell to create the necessary fifos when running layout tests.

BUG=232044
TBR=darin,yfriedman

Review URL: https://chromiumcodereview.appspot.com/16599008

git-svn-id: http://src.chromium.org/chrome/trunk/src/testing@207060 4ff67af0-8c30-449e-8e8b-ad334ec8d88c