Make IdeInfo aware of jarjar-ing

jarjar can be used to repackage a java_library. e.g. Foo.java in package
com.android might get repackaged to prefix.com.android.Foo in the
resultant jar. To allow code completion of rdeps, we should use the
repackaged jar instead of the src files.

This CL sets dpInfo.Jars to the header jar _only_ when jarjar_rules is
not empty. We could probably set `Jars` to the header jar even for non
jarjar-d libraries and get rid of `Srcs`, `SrcJars` altogether, but that
would likely slow down any tools that index
out/soong/module_bp_java_deps.json for code completion.

Test: go test ./java
Bug: 356572093
Change-Id: Ib45810799a479cb315aed011a34351d386a21357