Few bug fixes and warnings removed

Added support for returning coded width and height along with display dimensions
Fixed few macros for mips
Removed signed comparison warnings
Removed few files that are not needed
Fixed an issue in handling more than 256 slices in a picture

Bug: 14571712
Change-Id: Ie485aaae3a13744bc9acff8aa699efbbc31f94f1
21 files changed