Close old cursor when making a new one.

bug:30216042
Change-Id: Ia3fe86c141a69dd4c7d3a75cfd39b9983dcec6da
diff --git a/src/com/android/providers/telephony/TelephonyProvider.java b/src/com/android/providers/telephony/TelephonyProvider.java
index 3a6cf42..0a91304 100644
--- a/src/com/android/providers/telephony/TelephonyProvider.java
+++ b/src/com/android/providers/telephony/TelephonyProvider.java
@@ -1671,6 +1671,7 @@
             }
             result.addRow(values);
         } while (c.moveToNext());
+        c.close();
         return result;
     }