Settings: Update time zones

PS1: Update time zones and the corresponding translations
PS2: Add 'Peking' to the corresponding time zone string

Signed-off-by: meviox

Change-Id: I9051e9f2500c0c5ef0696f51c95cdb7fd33ead71
Merge "Settings: Update time zones" into cm-10.1
Settings: Update  German translations

* Settings > Interface > Lock screen > Slider shortcuts:
  - 'plazieren' -> 'platzieren'

* Settings > Wi-Fi > Advanced > Wi-Fi priority:
  - 'WLAN-Priorität'

* Settings > Device > Storage > USB computer connection:
  - 'USB-Massenspeicher aktivieren'

* Settings > System > Status bar > Signal status style:
  - 'Signalstärke in dBm' -> 'Signalstärke'
  - 'Signalstärke (nur Wert)' -> 'Wert (dBm)'

* Settings > Lock screen > Background:
  - 'Hintergrund'

Change-Id: I34f456a57add344de9c9b7c06221079f5d54f8b4
Merge remote branch 'cm/cm-10.1'