SystemUI: fix RecentPanel position in landscape mode.

In landscape mdoe we forcing ltr layout direction. This cause
call to resolvePadding too late and discards paddings
computed by fitSystemWindows. To workaround this we can catch
onRtlPropertiesChanged and force executuin of fitSystemWindows
one more time. To fix scroll issue after padding will be setted
we calling scrollTo with correct position.

Change-Id: I0ac10ac3554142b15114ce7588b61debda27235a

Conflicts:
	packages/SystemUI/src/com/android/systemui/recent/RecentsHorizontalScrollView.java
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