Defers delivery of contentIntent and activity actions until the lockscreen has been dismissed, so that activities don't launch beneath it. Bug: 14491010 Change-Id: Ic8c61c18a75d4f0da2d82a0a8a038a5d98ebb71f (cherry picked from commit 79f640dd0d02c1cc199937b160d8f7abd3c1eaeb)