Add AnimatedImageDrawable to host build of libhwui

This puts Looper usages behind #ifdef __ANDROID__ as the looper is not
supported on host builds. Instead of using the looper to call the
InvokeListener, the listener is called directly for host.

Bug: 322360037
Test: build libhwui on host
Change-Id: I133fa5a7b50e9681160f0a70c23f3946b51a7cd6