AutoSize TextView - take horizontalScrolling into account

When passing the characteristics of the current TextView
to the StaticLayout for auto-size measurements also take
the horizontallyScrolling into account similarly with how
the actual measurements are done (@ TextView#onMeasure).

Bug: 37254477
Test: cts-tradefed run cts-dev -m CtsWidgetTestCases -t\
      android.widget.cts.TextViewTest

Change-Id: I44b85e77d9b1770f188a0f59f103e3fda284e97a