Restrict java_sdk_library in libs of java_import and droidstubs modules

These are all remaining usages of "magic", which are being removed with
this change. The follow up change will remove the "magic".

Test: m nothing --no-skip-soong-tests
Bug: 366069293
Change-Id: I4762682cb8696b435b9f0fb0f4c55ba2fa865f05