Rename updatable-library to apex-library

Mostly for consistency with the names used in related changes.

Test: atest com.android.server.pm.parsing.library.ApexSharedLibraryUpdaterTest com.android.server.systemconfig.SystemConfigTest

Bug: 191978330
Change-Id: Ic4ccc0fdca100b576e28bc0918d378cabae9ce61
Merged-In: Ic4ccc0fdca100b576e28bc0918d378cabae9ce61
2 files changed