Clean up status bar date & time code

Remove unused imports and variables

Change-Id: Iab33d91ecbc90e4d2714aa55a943492b5042f880
frameworks_base: Update Japanese translation

Core: add missing entries from CM-10.1
SystemUI: add cm_strings.xml from CM-10.1

Change-Id: Iaf10e271e1373c71fbb5e79e7a73a87c465e8963
Merge "Clean up status bar date & time code" into cm-10.2
Merge remote-tracking branch 'upstream/cm-10.2' into HEAD