Allow different namespace types for different classloaders

An app should be able to make cross-arch calls to different apps
via other app's Context.getClassLoader()

Bug: 32542970
Test: Boot fugu. Check that there are no linker-namespace
      related errors in the log.

Change-Id: I1593f4688bcde0121a5e24a707441a4935fa7dc4
4 files changed