Add regression test for PaintFlagsDrawFilter.

Test verifying that I269cbd7a624e5dde5688305e1ba97075ba73f4fd
fixed PaintFlagsDrawFilter using Paint.FILTER_BITMAP_FLAG.

BUG:15112859
Change-Id: Iec9a700d09aa360754ae9b3705750273910440f6
1 file changed