Fix include

Bug: 35387665
Test: builds with HWUI_ENABLE_OPENGL_VALIDATION := false

Dependency on gl3.h was added while that header was auto-included for
error checking purposes. Add the include to enable us to disable gl
error checking.

Change-Id: Ic969da716e2323f8e42d20da8fd0a6fa653f9775
1 file changed