Use argb evaluation method from animation package, lazily create paint,
set default for stroke line cap and join. Fix scaling to bounds. Fix
drawable in test app.
Change-Id: I245d5d6acc6ba9806743ab2bf9bf99aff3649c39
Rename the test from DynamicDrawableTest to VectorDrawableTest.
Remove duplicate function calls in the test.
Fix comments in VectorDrawable
Change-Id: I1ef87137088ccc10b1abdb40ca368345d9dbadab