otasigcheck: Don't fail a signature check if data will be wiped

If the --wipe_data command is being passed to recovery, skip the
signature check since the data will be wiped after the update is
installed

Change-Id: I6641f25abd044110faaf170ab2f7982460e77bcb
Revert "cm: Add some app-specific performance settings"

This reverts commit 34d5e908433ce79e1c7fbcb88cf1661a4adb1743.
Clean up

- Remove CM Updater
- Remove CM Wallpaper
- Remove LockClock
Persist DPI & Xposed across flash