Revert^2 "Do not dexpreopt system server jars from updatable modules."

This reverts commit fa7cf280.

Reason for revert: Build failure is not reproducible.
Forrest build on the same build ID 6033773 and same target
cf_x86_phone-userdebug_coverage finished successfully.

Change-Id: I188623237dfba657fb48966e0a34a975f13d00d2