LineageParts: Add reset button to ApplicationLightPreference

*) Add a reset button to ApplicationLightPreference dialog.

*) Button is not shown by default but can be enabled by
   calling setDefaultValues(color, onMs, offMs) on an
   instance of the preference.

*) Enable reset capability for each battery light and the
   default notification, missed call and voicemail lights.

Change-Id: Iab1dcad048de838bb9015c62a4171b002141f09a