Deprecate eglCreatePixmapSurface

This function was never properly supported. It had partial support in our JNI
layer in EGL10 but not implementation in EGL14. It has never been tested and
it is unlikely that drivers support pixmap rendering.

Bug: 11257511
Test: CtsGraphicsTestCases
Change-Id: I209fff470c715cd97148a32b2f41ecf7e5283bab