When a preferred density is supplied, the closest matching densities
will be selected, the rest stripped from the APK.
Split support will be enabled in a later CL. Command line support is still
needed, but the foundation is ready.
Bug:25958912
Change-Id: I56d599806b4ec4ffa24e17aad48d47130ca05c08
Without needing to conform to the runtime data format,
it is much easier to add new features such as debugging symbols
and carrying over product data to link time.
This also simplifies the runtime format parser and serializer,
which will change much less frequently than the protobuf intermediate
format.
Change-Id: I209787bbf087db0a58a534cb8511c51d21133e00
