Add dependency on implementation <uses-library> for modules that depend on component libraries.

If a dexpreopted Java module depends on a component library (such as
stubs), it must be dexpreopted against the implementation library,
because that is what it will use at run time. Therefore dexpreopt needs
to know about the implementation library.

One of the subtests of TestUsesLibraries is removed. This is because the
subtest was previosuly split in two variants with the only difference
that the first variant had dependency on a stubs library, and the second
one had dependency on the implementation. The latter caused dexpreopt to
be disabled because Soong couldn't find the implementation (it had only
the name, but no access to the module). Now that there is a dependency
on the implementation, the problem goes away and the two subtest
variants can be merged into one.

Add a method for getting the name of the implementation library for the
optional SDK library. Currently it is the same as the SDK library name,
but it may change in future.

Test: lunch aosp_cf_x86_phone-userdebug && m
Bug: 132357300
Change-Id: I584df4b6db874c7ae3c478231fc51572a46929b1