Support mechanism to select a specific version of module sdk prebuilt

This CL is the java_system_modules_import equivalent of aosp/2928483.

With trunk stable, we will have multiple versions of art prebuilt apex
in the tree. Each art apex will contribute its own module sdk, i.e. its
own prebuilt system_modules to the build. This CL introduces a mechanism
to selelect a specific version of prebuilt system modules using
apex_contributions.

Implementation details: Create a new source_module_name property to
identify the root module. rdeps referring to the root module will get
redirected if necessary.

Bug: 322175508

Test: Added a unit test
Change-Id: I9f885ffa5afea96d2e6ce077264d3b207ed7e80d