Add pie control optimizations for Phone UI.

This commit brings some pie control tweaks to the Phone UI. These
tweaks make the pie controls react to several conditions that are
are special to the Phone UI. That means that this piece of code
is more deeply embedded within the SystemUI code.

This mostly adds the foloowing behaviour, that is Phone UI
dependent:
* Disable BOTTOM trigger when notification area is expanded
* Disable LEFT and RIGHT trigger when a keyguard is active
* Enable search light feature

Patch Set 3:
* CyanogenMod Code Style.
* setDisabledFlags now belongs to navigation bar callbacks

Patch Set 5:
* Removed duplicated .observe()

Patch Set 10:
* Fixed unintended trigger activation

Patch Set 13:
* Searchlight opens directly on the bottom (on the lock screen)

Patch Set 15:
* Fix conflict/rebase

Change-Id: I551745b69791adca75190c54282be19d85db75a9
FlingTracker can divide by zero and hang StatusBar in an infinite loop

if 2 events have the same timestamp then FlingTracker in PanelView will divide
by zero causing NaNs. the bug is usually triggered by rapid StatusBar up/down
dragging activity and updateCarrierLabelVisibility can then loop indefinitely
looking at NaNs. the user visible symptom is that StatusBar refuses to pull
down and is burning cpu time.

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

Change-Id: I0791c6bea953bf03346185fc6aaf44aaea79aace
Fix divisions by zero on boot.

Change I976ffae3a56d411b00026f86b16efa9743a23293 introduced a problem
where depending on the rotation settings the WM override display
configuration would be filled with invalid values.
Fix that by correctly checking that the display is ready prior to
setting the override configuration.

Change-Id: Ia3fd7603d9c1212cd32536803b4c12390a798606
Fix pie controls being disabled by launcher gestures.

Some launchers have gestures for expanding/collapsing the status bar
from swipe gestures which call the respective StatusBarService methods
even if the status bar isn't visible due to expanded desktop. Because of
that, the status bar code internally thinks the expansion is carried out
(even if invisible), thus disabling the bottom pie controls in the
process.
Fix that by making PhoneStatusBar aware of it being hidden by expanded
desktop and ignoring the expand call in that case.

Change-Id: If386ca953517d9b5efcb6cb9054f5c5e6a9e0bc4
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
Remove opaque check in GLRenderer when preparing dirty region.

Since preserved swap is enabled, we need to clear the color buffer
when the scissor rect is prepared for a new process. This prevents
garbage to be present from the previous process in the color buffer.

CRs-Fixed: 391492, 403067, 405916

Change-Id: I1f72a3dee2f5d58a984f4cd367c9f7bf08ab9d6a

Conflicts:

	libs/hwui/OpenGLRenderer.cpp

[PATCH] Remove opaque check in preparing dirty region

Since preserved swap is enabled, we need to clear the color buffer
when the scissor rect is prepared for a new rocess. This prevents
garbage to be present from the previous process in the color buffer.

(cherry picked from commit 2b5e584e2615852b68a69bb529c6926190246b64)

Change-Id: I92a4fa35e0746f12fcd736e21fd30d9c4b644a8a
CRs-Fixed: 391492, 403067, 405916

Conflicts:

	libs/hwui/OpenGLRenderer.cpp

Enable scissor when preparing dirty rect that is opaque

Now enabling scissor before setting it in the opaque case, previously was not doing so.

Change-Id: I1ea904cf01603096e423556090564291ab712d36
CRs-Fixed: 465346
Depends-on: 278453