Allow linking to libicuuc.so and libicui18n.so from executable in /data

Executable in /data/ runs in default linker namespace, not
classloader namespace.
In Q, we moved libicuuc.so and libicui18n into the runtime
namespace, and allow linking from runtime namespace and classloader
namespace.

This change further allows linking from default namespace, and tries
to fix the regression temporarily.

Bug: 130788466
Test: The app issue is fixed after this CL
Merged-In: I3e392cf5a0573e4d303fa187eda4f0bf6cd49c6c
Change-Id: I3e392cf5a0573e4d303fa187eda4f0bf6cd49c6c
(cherry picked from commit f03b151a9b86bc47f501ec7ea0b71d0598e90d52)