Revert "Adapt dalvik to new libnativehelper"

This reverts commit 0dae5763c4bea3772c3b97c919c933a4db04688c.

Conflicts:
	vm/Init.cpp
Revert "Tracking changes to *-host for host shared libraries"

This reverts commit e5475cd77237e54ef7d8210c4858a341f54b9630.