ConnectivityManager: Address review comments from aosp/1595396

Bug: 156867433
Test: atest android.net
Test: atest com.android.server
Change-Id: I7f5d043732ae22edd14bf581b7dc676c9236b545

framework/src/android/net/ConnectivityManager.java

@@ -3409,6 +3409,8 @@ public class ConnectivityManager {
          * not include location sensitive info.
          * </p>
          */
+        // Note: Some existing fields which are location sensitive may still be included without
+        // this flag if the app targets SDK < S (to maintain backwards compatibility).
         public static final int FLAG_INCLUDE_LOCATION_INFO = 1 << 0;
 
         /** @hide */