Don’t try to autoSize if TextView is not measured

This CL early returns from auto sizing text if the view is not measured
yet.

Test: run cts --test android.widget.cts.TextViewTest -m CtsWidgetTestCases
Test: Added cts.TextViewTest#testAutosizeWithMaxLines_shouldNotThrowException
Test: Manual test with sample app for the failing case.

Bug: 38440435
Change-Id: Ic03c991f33a2b7701623f00f44cba7fb6cdfce46