Add BarringInfo.BarringServiceInfo#toString

This is missing currently, so we get memory addresses instead of useful information in e.g. TelephonyRegistry dumpsys.

Change-Id: I6c685e9015f666da642d970a37b2f3361dfb41a8
Tested: make + `dumpsys telephony.registry` on device
Bug: 304400868

telephony/java/android/telephony/BarringInfo.java

@@ -202,6 +202,24 @@ public final class BarringInfo implements Parcelable {
                     && mConditionalBarringTimeSeconds == other.mConditionalBarringTimeSeconds;
         }
 
+        private static String barringTypeToString(@BarringType int barringType) {
+            return switch (barringType) {
+                case BARRING_TYPE_NONE -> "NONE";
+                case BARRING_TYPE_CONDITIONAL -> "CONDITIONAL";
+                case BARRING_TYPE_UNCONDITIONAL -> "UNCONDITIONAL";
+                case BARRING_TYPE_UNKNOWN -> "UNKNOWN";
+                default -> "UNKNOWN(" + barringType + ")";
+            };
+        }
+
+        @Override
+        public String toString() {
+            return "BarringServiceInfo {mBarringType=" + barringTypeToString(mBarringType)
+                    + ", mIsConditionallyBarred=" + mIsConditionallyBarred
+                    + ", mConditionalBarringFactor=" + mConditionalBarringFactor
+                    + ", mConditionalBarringTimeSeconds=" + mConditionalBarringTimeSeconds + "}";
+        }
+
         /** @hide */
         public BarringServiceInfo(Parcel p) {
             mBarringType = p.readInt();