Merge Navigation Bar and Pie Controls button config (1/2)

Based on the commit series for pie controls, this commit
makes the Navigation Bar and Pie Controls share
the same button layout. However, there is no button layout
editor for pie controls, which makes the navigation bar
the leading entity when it comes to button layouts.

This commit introduces:
* A common notion of navigation buttons used in CyanogenMod.
  (class NavigationButtons)
* Some setting constants changes to avoid clashes with PA.
* Removal of the pie search key, since it is no longer needed.
* Sophisticated key event injection.
* Virtual key sound effect

Change-Id: Id68f8d0b597d7d89c55c3f66f994e632d014f006
Merge "Merge Navigation Bar and Pie Controls button config (1/2)" into cm-10.1
Merge remote-tracking branch 'cm/cm-10.1' into cm-10.1

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/policy/PieController.java

Change-Id: Ib027721a2d27d6eaf243988937022f057aa0a593
SettingsProvider: Initialize defaults for CM features

Add configuration defaults for:
- status bar notification count
- QuickSettings quick pulldown
- lockscreen targets

Change-Id: Ief4b97fcceea7e351a13d59136a2fb1823d97b04
SystemUI: Fix build warnings

Change-Id: I3493428eb5192bf39b31bf8a5c66406660af1aca
Merge branch 'CyanogenMod' into cm-10.1

Signed-off-by: Humberto Borba <humberos@gmail.com>
Merge branch 'sgt7' into CM10.1
Merge "SettingsProvider: Initialize defaults for CM features" into cm-10.1
Merge branch 'CyanogenMod' into cm-10.1

Signed-off-by: Humberto Borba <humberos@gmail.com>
Merge branch 'sgt7' into CM10.1