Get rid of old Harmony Services cache

Each java.security.Provider.Service has its own cache, so there is not a
lot of benefit to having another cache of the caches. In fact, this
makes adding a new provider a huge hit. This change makes adding a new
empty provider go from ~5080 microseconds to 73 microseconds.

Bug: 21159204
Change-Id: Ib23032f8cb0def79367a321b48241b6cc94de6b0
5 files changed