Reduce unit test log level for notifications.

The current debug level of notifications causes unit test debug
files to be very large. This patch reduces the default log level
for notifications to INFO. This single change reduces the size
of the debug file by 20Mb (or 38%).

Change-Id: Idede6fd47d74705dd0fd62c009ebf7bba10f82ed
Closes-Bug: 1369180
Merge "Reduce unit test log level for notifications."