tuna: Set 'normal' as time for notification LED

By default, 9s off is too time to see a notification pulse.
Furthermore, the user cannot set this time in Settings because
max value is 5s.

This commit sets the off time to 1s (normal value) by default.

Change-Id: If1ad3504e6570b070a9edbc2b69215427925f830
Merge branch 'cm' into HEAD