Adds private EGL extension to create an EGLClientBuffer from a gralloc'd buffer.  This lets you create a color EGLimage backed by gralloc, which is needed to support protected textures.

Bug: 22775237
Bug: 22855417

Change-Id: I8e03061d74a74a8fdd6524ffa97a6c75a6ced89c
5 files changed