Ignore EGL_BAD_CURRENT_SURFACE errors from eglSwapBuffers

Certain EGL device drivers are generating this error, so we need to
survive it. (It's not clear from the EGL spec whether this is a
legitimate error code, but since it's being generated we need to
handle it.)

Remove logging of expected errors from elSwapBuffers. We expect these
errors to happen, and are handeling them by ignoring them.
No need to clutter the logs.

Bug: 6083241

Change-Id: If17dcfbb68d3009b92cf95a448728ccb47023b51