Allow toggling of status_bar_show_battery_percentage [2/2]

Change-Id: I5b95d6009a786d313233caed6faf5f9272a59d86
Forward port statusbar brightness control

Change-Id: If9a5e9e61bd4e49e83a5cea7ba5aa296c7120328
Custom carrier text [2/2]

Change-Id: I328b8eb9781fd0f4424bf53f8e5d0b7e82f0ad0a