Flip native fence sync check for tex binding.

External textures should only be bound when native fence syncs are not
supported by the GL driver.

Bug: 116277151
Test: SurfaceFlinger_test, libsurfaceflinger_unittest, go/wm-smoke

Change-Id: I0f38f678917ac45bd3d118419d9c4d4c3a520091
2 files changed