UI fixes to All apps pull up work

b/28917826
- nav bar change to light when top of the all apps container
passes y mid point of the status bar
- apps search edit box change when top of the all apps passes
the bottom of nav bar
- Restrict pull up to work only if the ACTION_DOWN event started
from the hotseat.
- Landscape: reverted old padding and margin. Only the interaction
is different.
- Tuning of the motion spec
- Animation duration respects fling speed more agressively.
- and many more small bugs...

Change-Id: Icde4093c41eeab8c9c6d9dc8b7d57adc3b171349

src/com/android/launcher3/BaseContainerView.java

@@ -51,7 +51,9 @@ public abstract class BaseContainerView extends FrameLayout {
         super(context, attrs, defStyleAttr);
 
         int width = ((Launcher) context).getDeviceProfile().availableWidthPx;
-        if (FeatureFlags.LAUNCHER3_ALL_APPS_PULL_UP && (this instanceof AllAppsContainerView)) {
+        if (FeatureFlags.LAUNCHER3_ALL_APPS_PULL_UP &&
+                this instanceof AllAppsContainerView &&
+                !((Launcher) context).getDeviceProfile().isLandscape) {
             mHorizontalPadding = 0;
         } else {
             mHorizontalPadding = DeviceProfile.getContainerPadding(context, width);