java_sdk_library: Specify visibility of stubs modules

Adds two new properties to specify the visibility of the stubs modules
(source and library) created by the java_sdk_library. Excludes
visibility property from being inherited when creating the module so it
can be properly specified by copying across the relevant property.

Test: m checkapi
Bug: 155164730
Change-Id: Iffdd9f191ff0d74646356ac577560cc38efdd790