wayland-ivi-extension: disable building EGLWLMockNavigation example

wayland-ivi-extension: disable building EGLWLMockNavigation example

Disable building the EGLWLMockNavigation in wayland-ivi-extension to
avoid needing to patch it to build for the TI platforms.  This fixes
the issue of meta-agl-bsp/meta-ti breaking non-graphics profile builds
like the telematics profile, and seems reasonable since there are no
known users inside AGL.  Since it is no longer needed, also remove the
offending patch from meta-agl-bsp/meta-ti.

Bug-AGL: SPEC-2677

Change-Id: If87c3c238e880d01f99401ea4610616656f16185
Signed-off-by: Scott Murray <scott.murray@konsulko.com>