[2/2] SystemUI: Add brightness slider to notification drawer

adds a brightness slider below the expanded statusbar header and
(if enabled) quick settings ribbons

Change-Id: If025fd84fa2dcaacbd4a12039eea7d37ba5b82d8
(cherry picked from commit aee11028c75be50fd828d299b5aeb87422192206)

Conflicts:
	res/values/cr_strings.xml
Fix volume steps not showing chosen options in their respective settings
- Also follow  a better coding style

Change-Id: I7fb983fd880e46c43f5610b9a5ae1b7f5782dbea
(cherry picked from commit fe2aabb7af43afd9733a0cc70bf4a07ddff90ef6)
Settings: SlimRecents scaling + lefty mode (3/3)

    - Add scaling mode....user can scale the overall size down (especially for the
      user with stock dpi requested)

    - Add lefty mode. Recent panel shows up on the left edge instead of the right edge
      for left handed people.

Both are one time accesibility settings. So we put it there.

Change-Id: Ibd3382a94c65699cfdd00559a9045bdc91c558bb
(cherry picked from commit 513e4525964ae33e3f72fd2461f7c3bbe21125ba)

Conflicts:
	src/com/android/settings/accessibility/AccessibilitySettings.java
[2/2] Settings: On-The-Go mode

On-The-Go turns on the camera of your phone and streams it to an overlay,
which is drawn over everything.
this makes you feel like your display is transparent, as you see the content
behind it.

its really useful when you are using your phone while walking, thats why
we called it "On-The-Go"

have fun!

Change-Id: I31c03d9e02c238e237681354b3991a0427c0c47b
(cherry picked from commit c6b50bbb354fc8a573b409b87d6410d8de47b68f)
This option is for Slim Recents

(cherry picked from commit f341c53ef4a746225782c95325446955d3bb5818)
[2/2] Settings: On-The-Go: Add quicktile

Also thanks to @Alex-Cruz for all these nice talks, which improved the
quality of the On-The-Go mode :)

PS 2:
On-The-Go drawables, made by Alex-Cruz, thanks!

Change-Id: I30d8232746ac0a0bd5ccfbfba435e0ac1658becb
(cherry picked from commit 1c2fd58846137430beb048231159e301b0827720)
[2/2] Settings: On-The-Go: Hide on devices without camera

Hide camera switching for devices without front camera as well
if we dont have a front camera, open the first camera we have.
also hide the options from the dialog.

Change-Id: Ic74579708dc4ff030cca97f1f5972dce105431d8
(cherry picked from commit c3a38054398bc49e3154bb3cd55747d6d4cdb1e9)