Remove java_sdk_library "magic"

This change removes the java_sdk_library to submodule calculus logic,
i.e. the "magic". The "magic" is no longer being used, as all existing
usages have been fixed to specify the submodule that it actually depends
on.

Test: m nothing --no-skip-soong-tests
Bug: 368144555
Change-Id: I653bd734959c3366a40f003274c921b012be24ca