Power menu: standarize capitalization for Screen record

Change "Screen Record" to "Screen record" to match the standard menu
styling.

Change-Id: I61c7adfe06c1d5ebc53c1c0b15b76e6d28a749f4
Merge "Power menu: standarize capitalization for Screen record" into android-4.4
Merge remote-tracking branch 'cm/android-4.4' into android-4.4