Settings: lockscreen wallpaper crash fix

If a user backs out fast enough after setting a
custom wallpaper, the fragment becomes detached
from the activity, so any calls to getActivity()
were throwing exceptions.

The solution is to use the application Context
for toassts to still inform the user of the
status, and not update any UI elements
after the fragment is no longer attached.

Change-Id: Ia9f61184fb484d3af25565bc3c56e8b7b63ff4eb
Signed-off-by: Roman Birg <roman@cyngn.com>
Settings: remove screen-off animation checkbox

Instead of having a separate checkbox on whether to
enable an animation, let's collapse it into the listview
preference. Now the user is presented with 3 options:

* Disabled
* Electron beam
* Fade out

Change-Id: I8bdcfbf5eba6b639eecabe22ad9b78b642f636df
Signed-off-by: Roman Birg <roman@cyngn.com>
Don't show "Eject card" if the card is not accessible

SD card is not accessible without removing the battery on some devices.
Remove the "Eject" options on those devices

Depends on http://review.cyanogenmod.org/62708

Change-Id: Iddfa72314f7c96579ddd98e8fb312236348b7c2d
Merge "Settings: remove screen-off animation checkbox" into cm-11.0
Merge "Settings: lockscreen wallpaper crash fix" into cm-11.0
Settings: disable hardware unlock buttons while secure

Disable the unlock home/menu/camera options in settings
while a secure lockscreen is active to signal they do
not work to the user.

Change-Id: I193d253d40c7ceef80c6659b08d02be7159f476d
Signed-off-by: Roman Birg <roman@cyngn.com>
Merge "Settings: disable hardware unlock buttons while secure" into cm-11.0
Merge "Don't show "Eject card" if the card is not accessible" into cm-11.0
Merge branch 'cm-11.0' into cm-11.0-sc