Revert "AssetManager cookies should be int32_t and not void*."

This reverts commit 287f3a71cecf462943155ccc909b40c5457b1f10.

Conflicts:
	include/androidfw/AssetManager.h
	libs/androidfw/AssetManager.cpp

Change-Id: Ib48eef4ad7c95fec71a68fa0c393b6f82d7bfffc
[T-Mobile Theme Engine] Fix merge derp

Change-Id: I183a558f7f581b285d4a3b37f60e2c5d506e1caa