SurfaceFlinger: try dropping features from EGL config query before giving up

Change-Id: I914aba2b0404646a29854e8e2ffa708958fb41f1
libEGL: restore SYSTEMUI_PBSIZE_HACK

This was removed in the otherwise unrelated commit f4486c6...

Change-Id: I6b62a3a4332a0376eb6865c2674aaf3f8ef262bd