Delete wrap_gles capability

* Error enforcement doesn't work with libhwui anymore
* We can just do the real, proper thing for unit tests
  & microbenchmarks, which is arguably better anyway
* hwui doesn't have much opengl code left that was wrapped

Fixes: 128629988
Test: hwuiunit, hwuimacro, and hwuimicro all still run
Change-Id: If2568ea0745a67f83e1290860d474c1a01870376