Change the dist file path for sdk library

The dist file path is changed from apistubs/{api_scope}/*.jar to
apistubs/{owner}/{api_scope}/*.jar. it makes easy to get stub files
when updating prebuilts/sdk by making it possible to distinguish
between Android libraries and Google libraries.
And Onwer() function is added to ModuleBase for getting onwer info.

Test: make -j40 PRODUCT-sdk_phone_armv7-sdk dist sdk_repo
Change-Id: I50069aff6664901e6c9129d69643a414ee5e41d0