ply-image: Separate image loading and displaying.

This renames ply_frame_buffer_show_file() to
ply_frame_buffer_show_image() and makes process_images()
make a separate call to load each image that it wants to
display.  No functional changes intended apart from a debug
logging message; I'm just doing this to enable more
fine-grained benchmarking and make it possible to
preemptively load the next image.

TEST=boot animation still works on lumpy

Change-Id: I53fbe9b2a01ce54377061400829f7c77aea11f46
Reviewed-by: Simon Que <>
Reviewed-by: St├ęphane Marchesin <>
Commit-Ready: Daniel Erat <>
Tested-by: Daniel Erat <>
3 files changed