Add CTS on TDSCDMA getClosedSubscriberGroupInfo

Bug: 152411391
Test: CellInfoTest
Change-Id: I1a05c5e000b0e64622388e3373e3e1e3919c0bfa
diff --git a/tests/tests/telephony/current/src/android/telephony/cts/CellInfoTest.java b/tests/tests/telephony/current/src/android/telephony/cts/CellInfoTest.java
index 734d85f..4906ec4 100644
--- a/tests/tests/telephony/current/src/android/telephony/cts/CellInfoTest.java
+++ b/tests/tests/telephony/current/src/android/telephony/cts/CellInfoTest.java
@@ -994,6 +994,8 @@
             verifyPlmnId(plmnId);
         }
 
+        verifyCsgInfo(tdscdma.getClosedSubscriberGroupInfo());
+
         // If the cell is reported as registered, then all the logical cell info must be reported
         if (isRegistered) {
             assertTrue("LAC is required for registered cells", lac != Integer.MAX_VALUE);