Assume package failed to compile unless proven otherwise

BackgroundDexOptService keeps a list of packages which failed to
compile so that they are not revisited. If compilation takes so long
that the background job is killed, the offending package is not
recorded.

This patch records the package before dexopt is called and removes it
from the list if dexopt succeeds.

Bug: 28082762
Change-Id: If7388e159b999287b60f19dc99cf4dde61ec64c8