Revert "QuickSettings - fix FileObserverTile logic"

This reverts commit ad5378a51ad3d2ce76c9ae3d1b6ec602a889fc29.
Revert "Abstract tile for two-state kernel feature toggle"

This reverts commit 56d06acf5df0cb030457540484fa719654e7f43d.

Conflicts:

	packages/SystemUI/src/com/android/systemui/quicksettings/OtouchTile.java