Fix android.text.cts.SpannableStringBuilderTest#testReplace2

The test was failing because recent versions now throw NPE rather than
AIOOB. Given that the argument is null, I think NPE is appropriate, so I
am fixing the test to accept it as well.

Change-Id: I01caa93b0b737659b3b01a97decc729156994e88
1 file changed