Settings: Simplified Chinese translations

Added new strings, and revised some translations to
bring it in-line with the English ones.

Patch Set 2: More translation revisions, as well as
modifications for consistency.

Patch Set 3: More modifications and corrections.

Patch Set 4: Improve translations as per Engle Mars'
suggestions.

Patch Set 5: Manually rebased, and added App Security
translations.

Patch Set 6: Improved SMS security limit translations.

Patch Set 7: Rebased and further revision.

Patch Set 8: Added Home button unlock translations.

Patch Set 9: Added new power menu toggle options
translations.

Patch Set 10: Added Expanded desktop translations.

Change-Id: If4213d811b6b5cda43e75488a0e327253b4577f9