Make dex stubs jar available for use by hidden API processing

The hidden API processing for the art-bootclasspath-fragment requires
access to dex jars for the API stubs provided by the modules in that
fragment. Setting compile_dex on the java_sdk_library will generate
those files, and will be propagated to the snapshot.

Bug: 179354495
Test: m nothing
Change-Id: I3d0439b88da67d0f68e81dc041a3f00e0ba6b441
2 files changed