DeviceSettings: add support for vibrator intensity tuning

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

Change-Id: I052459b3c21ad8bcd2f87a3ea59187c25fb6f15b
DeviceSettings: remove deprecated brightness path

Also remove useless check of multiple backlight sysfs entries,
only check the first one

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

Change-Id: Ia207156f1dc07061fe90fda67b55ad1d0f1636dc
DeviceSettings: cleanup

Remove tab when the feature is not supported

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

Change-Id: Ic12cb4758f15be4a8ad29e7970d591495b6053a4
DeviceSettings: import translations

also remove summaries, title is already descriptive

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

Change-Id: I719428d4c9e9a72af580f00461e489cbb37a4cfc