fix for screenshot animation glitch in portrait

edits by Stefano Semeraro aka Suxsem.

Change-Id: I7a03a24c5b1bfdfe616f940b2bd7be42091f45a6
Put FileUtils back into android_runtime

We still use it for non-fat volume management

Change-Id: I42efeb83b8f12e7734e4bf03326526cc220d022a