Clean up the visibility rules for framework modules

Switching from java_library to java_sdk_library switched the meaning
of the module name from referring to the implementation library to
referring to the stubs. This change updates the visibility rules to
reflect that new meaning.

Visibility rules that were previously set for the java_library have
been moved to the impl_library_visibility property and the special
//visibility:override value has been prepended to prevent it from
inheriting the values from the visibility property.

Visibility rules set for the stubs (via stubs_library_visibility)
property have been moved to the visibility property.

Bug: 155164730
Test: m nothing
Exempt-From-Owner-Approval: Build cleanup
Change-Id: Icc9bc5a9ef86cf7ba0f15c2b2a4abd596ec9f640