Correct double tap to sleep summary

Change-Id: If2e7ab2c138e72eeb7d862738bb7dd3ad43d4b16
Correct development shortcut summary

Change-Id: Ia776d25c8f58789c3eedf16b7d5c705b04130b5f
Improve notification tone string

Change-Id: I731903a7bcda38229502de33dbc83c44e3782996