AOD: Never show bouncer when dozing

Fixes an issue where the bouncer was appearing on AOD under
certain circumstances. To prevent that, delay showing the
bouncer until we are no longer dozing or at least guaranteed
to wake up.

Change-Id: I0fa53616db09be98d33ea7d06b38d8ff3037707f
Fixes: 64287908
Test: Go to AOD; adb shell service call window 42; verify that bouncer only comes up after waking up from AOD.