SystemUI: Update pt-PT language.

Patch Set 1:
        * Add missing translations
        * Fix some terms
Patch Set 2:
	* Fix 'powerwidget_screen_timeout_toast'
	* Fix white space (tab space) in beginning
	  accessibility_battery_level
Patch Set 3:
        * Fix accessibility_battery_level
Patch Set 4:
	* Fix powerwidget_screen_timeout_toast,
	      accessibility_ringer_vibrate and
	      accessibility_ringer_silent
Patch Set 5:
	* Reset values-es, mischanged.
Patch Set 6:
	* Fix powerwidget_screen_timeout_toast incoherences

Change-Id: I5e537f5b18667021b464505410c73701b0c02d9e