This change replaces lazy get-or-create logic for
linker namespaces with the explicit one.
ApplicationLoaders.getClassLoader(..) is now resposible for
the namespace initialization for PathClassLoaders.
Bug: http://b/27189432
Bug: http://b/22548808
Change-Id: Ife987c3ca1db33a47c20f363a5ed61512be8b5a7
(cherry picked from commit d047c925af)
Shift responsibility of preloading native libraries to the user
of the library. This lets applications that do not use jni but
depend on libnative_loader.so to avoid unnecessary preloads of
public libraries which could be expensive.
Bug: http://b/27245894
Change-Id: I12a8100de5da639c068769bca21ecebff2b2d538
(cherry picked from commit 426799d770)
