CtsBinderNdkTestCases: Add test for AIBinder_Class_getDescriptor

Adds a libbinder_ndk test to ensure that we properly retrieve the
descriptor string for an AIBinder Class.

Bug: 167723746
Test: atest CtsBinderNdkTestCases
Change-Id: I907a817bda42b7d9cafb0b4d953d7621b1f2ab24
1 file changed