SystemUI: Fix missing top task in recent panel.

If preloadRecentTasksList was not called or was called too
late and RecentsActivty already started and last top activity has
excludeFromRecents flag setted it might be missing
from recent application list.

Change-Id: Idf7153824805ceea9fcaf04ac645b73a5e93a4d9
SystemUI: Fix wrong behavior of recents pie.

Call preloadRecentTasksList when user moves over
recents pie.

Change-Id: Ic62343cb6ae9c5ab8bb90bf6eca4fb2d13493cac
Merge "SystemUI: Fix missing top task in recent panel." into cm-10.2
Merge "SystemUI: Fix wrong behavior of recents pie." into cm-10.2
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2