Add a quick SELinux mode toggle

There's no way to make it persistent, by design. This is purposefully
undocumented and meant to test policies at this stage.

Change-Id: If6303e7ae2553b165fffc35f2bd72969dfe7ccc5
Signed-off-by: Arnav Gupta <championswimmer@aokp.co>

Conflicts:

	src/com/android/settings/DeviceInfoSettings.java
Show a preview of the selected font size immediately

Modified the font size preference dialog to show the user the selected
font size immediately. Also split the size description and percentage on
their own lines to show a preview of two different font sizes. In
addition, removed the gigantic title bar from the dialog.