Allow java_sdk_library_import to contribute to hiddenapi processing

Invokes hiddenAPIExtractInformation() on the java_sdk_library_import's
dex implementation jar provided by the deapexer (on behalf of
prebuilt_apex) so that hiddenAPI can extract the information it needs,
if anything, from the dex file.

The dex file provided by deapexer has already had the hiddenapi
information encoded into it so it does not need to do that again.

Usually, it would require a classes implementation jar as well in
order to extract information from UnsupportedAppUsage annotations but
that is not available for a java_sdk_library_import. Fortunately, the
modules that are currently affected by this do not contain any such
annotations. This just uses a public api stubs jar instead.

Bug: 181267622
Test: m nothing
Change-Id: I96275e46f8b7fecba88075319e9f2da5ae315c03