New installation path for apks and their JNIs.

Apk's path is changed to <parent_dir>/MyApp/MyApp.apk;
JNI path is changed to <parent_dir>/MyApp/lib/<arch_name>/libfoo.so.
Symlinks of JNIs are changed accordingly.

Bug: 16319961
Change-Id: Ib3b2309c95fa9aea27837fcc29e28d990b04747b