Delete EglBase.ConfigType, instead pass arrays of attributes, and define constant arrays for the common cases. Both in progress NativeToI420 and extending GlRectDrawer to other shapes (with alpha) needs this. BUG=b/25694445 Review URL: https://codereview.webrtc.org/1498003002 Cr-Commit-Position: refs/heads/master@{#10908}