Adds ability to answer call with hardware HOME button

preparation to winter time

Change-Id: I0d22a6fbb92a61f08b50cae5c14d0030b81ee6ec
Settings: FR translations

Mostly from CM 10.2 translation, with some modifications and new strings.
Patch set 2 : corrected LED translation according AOSP translation, added missing arrays and deleted useless strings.
Patch set 3 : added missing translations
Patch set 4 : cm_strings.xml was missing :(
Patch set 5 : added missings AOSP translations in cm_strings.xml
Patch set 6 : fixed some apostrophes.
Patch set 7 : rebase.
Patch set 8 : removed zRAM strings.
Patch set 9 : corrected according to comments.

Change-Id: I46b41baefdbfc8dc0769ebbdf39ecc09696689e2
Settings: ES translations

- Added customization of status bar

Change-Id: I841892af9b77544871e395e9eba6797112accc68
Settings: Update DE translation

Change-Id: I1b783e71f6a0984b01fe163433121a3b7fb886ad
Bluetooth: Don't set a null alias before unpairing

* This causes the unpair action to throw a null pointer exception and
  bring down the Settings app. Don't do this.

Change-Id: I0c60437f5ea934385a037a464743e24c9d341aca