frameworks: Add more power menu customizations

* Forward-port the rest of power menu customizations (airplane mode,
  screenshot, lockdown, bugreport, user switcher).
* Screenshot option will always show by default and can be turned off
  in Settings.
* Use the new LineageGlobalActionsService to get user's configuration

Co-authored-by: Bruno Martins <bgcngm@gmail.com>
Co-authored-by: Michael Bestas <mikeioannina@gmail.com>
Change-Id: I225037422937602940aafb5d20acea8c0bcff6ba