msm7x30: Add & enable DeviceSettings

Device specific settings extension
For now it supports button/keyboard backlight adjustment

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

Change-Id: Ibcb311e0f170289fe0102bf75be76909faadb919
DeviceSettings: Add DisplayHomeAsUp feature.

Enabled back feature by pressing the app icon at the top left corner.

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

Change-Id: Ia796fba852969788e9f0ca12d6b61785f09d7c70
msm7x30: don't build DeviceSettings

only build the advanced settings for the devices supporting them

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

Change-Id: I5bbeed14358a64f6e34b8abb0356467536c064f3
fix DeviceSettings and set brightness & max_brightness
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
Remove unused property