Use dex2oatd when available on debug builds

Enable use of dex2oatd for background dexopt service for eng and userdebug builds.
This allows us to have more extensive checking on dogfood devices.

(cherry picked from commit 0ff5f3c6)

Bug: 68025088
Test: adb shell cmd package bg-dexopt-job
Merged-In: If346c27594542b1e6a058369170f38b6ae24462f
Change-Id: If346c27594542b1e6a058369170f38b6ae24462f