Add libft2.so to ll-ndk for rs namespace

libft2.so is changed to ll-ndk that is available only for rs
namespace.

Bug: 64425518
Test: build and boot with BOARD_VNDK_VERSION=current
Merged-In: I991dc774ca9b92fb6e95a7656243a6a4ecdc0ab9
Change-Id: I991dc774ca9b92fb6e95a7656243a6a4ecdc0ab9
(cherry picked from commit 513f7639)