Fixed a RTL layouting bug with LinearLayout

When the RTL properties of a horizontal LinearLayout
changed, nobody enforced the view to be layouted anew,
even though its layout is dependent on the layout
direction. This could lead to stale layouts being
temporarily layouted the wrong way.

Bug: 20495301
Change-Id: I979c8d86ee711626b2901b65ebdf007c1eb1c0fa