replace aconfig_storage_reader_java to aconfig_storage_stub

This chagne replace aconfig_storage_reader_java to aconfig_storage_stub.
The former is a normal java library, and the later is a stub libray.
Since here we only need symbols for building, the stub library is safer.

Test: presubmit
Bug: 373641721
Change-Id: I6526783c9ce6fb90d9a746168859e8b850c1b7c8
2 files changed