Shorten first boot time by filtering dexopted apps by LRU.

No longer dexopt all system apps and boot listener user apps.

Bug: 23628238
Bug: https://code.google.com/p/android/issues/detail?id=186589

(cherry-picked from commit b84cb9e9)

Change-Id: Id1a1ca9f46777f9e62df3d4f25e98a2837fabf37