Fix layout recreation check

Change I7d6b088a9235362e03cb6694392df71bbf5a323a added a relayout
for programmatic text direction changes, but this is breaking some
fixed layouts. Make sure layout params exist before trying to
act on them

Change-Id: Ibfe3daa71490d109c9a4bdc4c90cbf9517e53260

Conflicts:

	core/java/android/widget/TextView.java