Add an extra debug flag to BackgroundDexOptimizer

This makes testing/debugging the job a bit easier.

Test: device boots, packages get compiled
Bug: 32871170

(cherry picked from commit a50d58e22630cd651a815381639e70476991bdbf)

Change-Id: I5b94a8f0b3bbf9075dcaecf028aaf79a21aaab7b
1 file changed