custom bootanimation improvements

- custom boot animation picker disabled if boot animations are disabled,
    for consistency
- set custom boot animations to /data/local/bootanimation.zip so we don't
    overwrite the system one.
- allow users to clear their custom boot animation

Change-Id: Ibdedf6c3c6bb55312a9088d5849af8f826cdffad
Signed-off-by: Roman Birg <romanbirg@gmail.com>
Fix Statusbar Toggles for spanish users.

Previous spanish translation commit made statusbar toggles unusable for spanish users upon setting up their devices.
Updated simplified Chinese translations

Change-Id: I4f13a931d15f27f28c633cd31723826430d472a2