Separate 2 clip paths into 2 groups

Since 2 clip paths is taking the intersection as the final clip, we should
separate this test case into 2 groups.

Prior to M release, the 2nd clip path is overriding the first one.
The behavior changed in this CL:
e9c01a40

b/16376848
b/19946683

Change-Id: Ib21c95e70f1317321725acbbe0ccf91713f748c3