[RESTRICT AUTOMERGE] Revert "libEGL: When driver doesn't understand P3, map...

[RESTRICT AUTOMERGE] Revert "libEGL: When driver doesn't understand P3, map sRGB-encoded P3 to sRGB"

This reverts commit ff499944.

Reason for revert: while correct vs spec, this change interacts badly with various other bugs in the framework. Will fix in Q instead.

Change-Id: Iea52555527e15e86891e50cd38d9f43499d3651c