Settings: FR translation

PS2: correction
PS3-4: rebase and add new translation

Change-Id: I3273a60fc290c116e3dbe186634cc2f97860d09c
[2/2] Settings: Volume panel timeout

Base: https://gerrit.omnirom.org/#/c/5516/

PS6
move it up below volume panel style preference

PS7
added volume panel category

Change-Id: Ic5c09e70ff08ad030119a8b169b885a8053e3a6f
Merge "[2/2] Settings: Volume panel timeout" into android-4.4
Settings: Update DE-Translation

Also removed double included Strings from res/values/custom_strings.xml (L64-70 = L242-248)

Change-Id: I3f55150149d9fc797c084548b402063143b8cd6c
Merge "Settings: FR translation" into android-4.4
Merge "Settings: Update DE-Translation" into android-4.4
[1/2] Settings: SeekBarPreferences tweaks

-added @string support for units
-use SeekBarPreference for button brightness timeout

Change-Id: Ia392c739e035f1c8372b817ba5574ec7be13d5a8
[2/2] Settings: Add custom periods for data usage measurement

PS4
externalize strings and minor layout tweak

Change-Id: I815f6a773375a855514bc9a6517f292ffcc157a2
Merge pull request #2 from omnirom/android-4.4

merge