SystemUI: tiles: Open display settings on long clicks for livedisplay tiles

* Since commit "LineageParts: Allow removing livedisplay pref screen with
  config_enableLiveDisplay" I17103ad116d1d26855fb47fdee1fa6cdc914e053 the
  org.lineageos.lineageparts.LIVEDISPLAY_SETTINGS action does not exist
  anymore and hence the long click was broken.

* Instead open the display settings where the LiveDisplay settings can be
  found easily.

Change-Id: I5ddcf9f8877552f60adb5216d065ffdf93786a44