Parse new xml attributes used for updatable shared libraries

Attributes added to the `library` tag used in AndroidManifest.xml.
They allow to easily and transparently include/exclude a library from
apps for compatibility purposes.

Bug: 191978330
Test: atest com.android.server.pm.parsing.library.ApexSharedLibraryUpdaterTest com.android.server.systemconfig.SystemConfigTest
Change-Id: Ibdde742a05fd670a9aaee5ee77ae25b9c0801f53