The reason we want to use EGL14 is to be able to use EGLExt.eglPresentationTimeANDROID when writing textures to MediaEncoder.
BUG=webrtc:4993
TBR=glaznew@webrtc.org
Review URL: https://codereview.webrtc.org/1461083002
Cr-Commit-Position: refs/heads/master@{#10864}