Apollo: Add Simplified Chinese Translations

Patch Set 2: Modified translationss for better accuracy, as well as
updated the copyright header as per Marco's request.
Patch Set 4: Merge http://review.cyanogenmod.org/34016, clean up unused
string.
Patch Set 5: Merge  http://review.cyanogenmod.org/#/c/34016/ and
http://review.cyanogenmod.org/#/c/34020/, add translation for
plurals.xml
Patch Set 6: Merge the translation in Patch Set 3 and fix some incorrectness translation.

Change-Id: I8d26ef1d887b40a1d058441cb0985a3dcbeb50d4
Merge "Apollo: Add Simplified Chinese Translations" into cm-10.1