Add image compressed blocks

Add support for splitting the image into a set of solid blocks.

Added dex2oat option --max-image-block-size and correspodning image
unit test.

Motivation: Enable parallel image decompression in the future.

Bug: 116052292
Test: test-art-host

Change-Id: I37c6c6a43ef94c4a62bf38a0cf51f26ce06347ac