Make the rs namespace visible

This allows us to dlopen libRS_internal.so directly from the rs
namespace, not from the sphal namespace.

Bug: 64747884
Test: VtsHalRenderscriptV1_0TargetTest successful on the device built
with BOARD_VNDK_VERSION=current and [system] namespace config is applied
to /data/nativetest[64]/* processes.

Merged-In: I0b441791e395798e80a84592ca01e771bb1c201a
Change-Id: I0b441791e395798e80a84592ca01e771bb1c201a
(cherry picked from commit 421a5e46b780cab394e4bc18745b8555ba26afa5)
diff --git a/rootdir/etc/ld.config.txt b/rootdir/etc/ld.config.txt
index fa6fc07..d9ed891 100644
--- a/rootdir/etc/ld.config.txt
+++ b/rootdir/etc/ld.config.txt
@@ -81,6 +81,7 @@
 # to load the compiled *.so file and libmediandk.so can be used here.
 ###############################################################################
 namespace.rs.isolated = true
+namespace.rs.visible = true
 namespace.rs.search.paths = /vendor/${LIB}/vndk-sp:/system/${LIB}/vndk-sp:/vendor/${LIB}
 namespace.rs.permitted.paths = /vendor/${LIB}:/data