Frameworks: add favorite mode

Allow user to set favorite apps in recent task list. User can set them with
longpress on the app icon. This apps are always shown in the task list above
the first default one (on phone the first 2 which always show the last 2 active
tasks). Favorites are shown in order of last time they were called. Favorites
settings are saved permanently till the user removed it from favorites.

As well this commit fixes the wrong icon if an package has more then one
activity to call (eg Google+ and Google Photo).

Using for all now a unique identifier.

Change-Id: I3cd7dd6600389c73e678f382377b441612902833
Frameworks: notify arrayadapter early that data has changed on clear all

Recent clear all. Current behaviour is that we do not update the array adapter at all
due that it gets rebuild on next reload. But in very rare cases it happens that getView
want to update shortly after all is cleared althought the view is not visible anymore.

Whatever just call notifyDataSetChanged after List is cleared to work against it.

Change-Id: I61ca25358ebe164336ba349565459537861c5495
Frameworks: do not kill favorite recent apps

Due of a lot user requests and I basically like the idea (not a fan of clear all apps at all
due that it does not make sense android wise) we ehance the favorite recent apps feature.

This commit basically does not remove the apps from the task list which were marked from the user
as favorite.

3 possibilities:

- No favorites are in the task list - clear all behaves like it was before - all tasks cleared and panel closes

- favorites and non favorites are in the task list - clear all removes all non favorite tasks and favorite tasks stay.
  Yes without fancy animations....we want to be fast ;) - panel stays open

- only favorites are in the list - pinch to zoom out is blocked due that nothing is there to clear all.

single clear of a task with swipe behaves in all cases normal like it was before this change

Change-Id: Ia05562e0f59dfb023aa65ec3a40dd951594dc88e
SlimRecents: Adress the 50ms touch unsresponsive issue

User reported that if the screen is fully animated in that the touch
detection is not working for about the first 50ms. For user who are working
fast this is indeed an issue. Especially due that the recent screen speeds
up the workflow much already.

Problem is our third loading stage due that after the recent screen animates in
it calls getView on all elements which rebuilds the touch listeners and cause to
the slight timeframe where it is unresponsive.

Well the third loading stage was a left over from the first optimizations when
we started to develop this feature. Other optimizations are into place now so we
do not really need the third loading stage at all. So instead of handling now
the fix in the getView implementation of the arrayadapter we simply just remove the
third loading stage completely.

PS:
- small other optimization

Change-Id: Ibf46fbe393de4f9d6b867e6bdb9c331dff1dd38e

Conflicts:
	packages/SystemUI/src/com/android/systemui/slimrecent/RecentController.java