kill references to 5551 and 4444 RGBA

Change-Id: I74b4d66f929b41cc605dd3aee20f825c8988052f
display: Export headers
Display headers used by other components should be at a common
location to avoid issues with future changes in paths.

 * remove libtilerenderer as well since its not built.

Change-Id: Ia6b53ed7e8504e977509df4b6181ad1783f445f6
Revert "display-legacy: clarify COPYBIT == HWC_BLIT"

This reverts commit b4331823c8c285cf757085fa265720703d52abc3.

* avoid having to make changes to libhardware

Change-Id: I1ab710d6a2e5e588ba8409ee639d39c3a982ef8a