Bug fix for wakeup sensors.

SensorService should hold a wakelock till the app reads events from a wakeup sensor. Currently drivers hold a wakelock with a
timeout while delivering events from a wake up sensor like Significant Motion. This hack can be removed now.
Bug: 9774884

Change-Id: I6cab0147c63f57a494a61f4dfe2a64a27dfe1b4e
2 files changed