frameworks_base: ES translations

- SystemUI: Restore AOSP strings
- Core: Added percent during low battery (same as default)

Change-Id: I0d0fb1a77a4033dbf0d7d5d174fb16e222826693
SystemUI: modify AOSP EL translations

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I405cd1d6cd8e77141d948510676cce48df5ee339
SystemUI: Add ethernet network icon

Add an ethernet network icon to the statusbar network area.

Change-Id: I019740f360b5f9cc85f404f75d38e38896182a81
SystemUI: Fix missing context var

Change-Id: I083f85fdfec2bde88e6d8e0366d94e86eaea20cd
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>