02890fd0f9
This change also removes the use of SoftReferences for View's drawing cache. A bitmap now creates a PhantomReference enqueued in a reference queue provided by the new Finalizers class. This queue is polled from a thread started after forking zygote. That thread is in charge of clearing the references after GC runs and of calling reclaim() on them. The reclaim() method is now how finalizers are run. Note that a PhantomReference cannot be kept in the instance it refers to, which is why they are kept in a separate List. Change-Id: If3c1a5e9dc23fa49e34857860d730f5cf5ad5926