am fa7a87fb: Merge "File writer size estimation improvement" into gingerbread

Merge commit 'fa7a87fb4b3d25b0b6b0985d65848a144d28df26' into gingerbread-plus-aosp

* commit 'fa7a87fb4b3d25b0b6b0985d65848a144d28df26':
  File writer size estimation improvement