Bring back the status bar activity indicators for mobile data and wifi

Google were nice enough to create xxhdpi drawables for us before removing them.

Reverts "Remove signal/wifi activity indicator icon overlays."

This reverts commit fcc901c10bffdfb9c6b31e676dec36b47d949979.

Change-Id: I7aa85f7c8442c45d17e42cac7823dfe93e3f24c1
add DeviceUtils helper class
fb: fix google observer derp

the way it was it does not detect any observer change on the
immsersive value. Fixed it by settings it to Secure completly

Change-Id: If8cf887650668e2399367e09614e91cc30b7f70b
Framework: safe headset volume option (1 of 2)
add volume rocker music controls (1/2)
[1/2] base: volume panel styles and tweaks

From CM - Support different styles of the volume dialog
allows expanding the dialog to show all adjustable volumes

New setting MODE_VOLUME_OVERLAY defines the style
0 = unchanged - single slider
1 = expandable - button beside to slider to expand - this is the default
2 = expanded - open already expanded

This also adds using setting VOLUME_LINK_NOTIFICATION
to allow adjusting the separation of notification and ringer volumes
default=1

This also already adds the new setting
VOLUME_ADJUST_SOUNDS_ENABLED default=1
to allow disabling the volume adjust sound

fixed some minor code style issues

- add all values multi user configurable

Change-Id: I94e0f944f76ee9751663de8ac40d99a342884259
Framework: Lock before unlock (2/2)

adds an option to show the slider before the security screen
clear all recents: clean up