blue: use -caf repo (2)

Change-Id: I7c8000e0bb69d2a719590dde15b8f71e62a3c912
Revert "dexopt /system apps to /cache"

This reverts commit a813438c7beebd1c3f007d922d870818bb17d2b6.

Change-Id: Iebe613e7eb26fd3d3b1cd1273c0a3c3a64e2c190