Tuner: Remove most keys from blacklist

* We ignore Lineage keys now generally, no need to maintain a complete list
  of those
* Keep Settings.Secure.DOZE_ALWAYS_ON and StatusBar.SCREEN_BRIGHTNESS_MODE
  as they are not lineage keys
* Make keys private where possible - they are not required outside of their
  classes anymore

List of changes that introduced the keys here initially:
- SystemUI: Bring back good ol' circle battery style
  Commit 439b220b
- SystemUI: Add tunables for clock AM/PM style
  Commit 0772b15a
- SystemUI: Add tunables for clock position
  Commit 5e0404f6
- SystemUI: Blacklist KEY_EDGE_LONG_SWIPE_ACTION for tuner
  Commit 804ed1c7
- TunerServiceImpl: Add another key to blacklist
  Commit 1629359f
- TunerServiceImpl: Blacklist notification panel tuners
  Commit 951e5378
- SystemUI: Allow translucent notifications background on lockscreen [1/3]
  Commit 2184236c
- Add support for runtime toggle of navbar
  Commit 625c820e
- SystemUI: Port statusbar brightness control
  Commit 8ed65f13
- SystemUI: runtime configurable audio panel location
  Commit d5ff4511

Change-Id: Ia811a17c0194fc501585ff9ffbed00682985daf3