BackgroundDexOptService: defer post-boot job further

Delay the post-boot dexopt job to avoid mmap_sem contention caused by
mapping dex files.

Test: boot, dexopt starts later
Bug: 161866124
(cherry pick from commit 097788086569bc464ee888f959d1413fa38e862b)

Merged-In: Iaceb2b7c34c7b923778a8a603d7b9666ea9a20c4
Change-Id: Iaceb2b7c34c7b923778a8a603d7b9666ea9a20c4
1 file changed