Merge "Improve RCS single registration logging" am: 6423b430a7

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1551618

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I37ceac74e581f77df29b0124faf46b1d43ed59d2

telephony/java/android/telephony/ims/DelegateRegistrationState.java

@@ -320,4 +320,11 @@ public final class DelegateRegistrationState implements Parcelable {
     public int hashCode() {
         return Objects.hash(mRegisteredTags, mDeregisteringTags, mDeregisteredTags);
     }
+
+    @Override
+    public String toString() {
+        return "DelegateRegistrationState{ registered={" + mRegisteredTags
+                + "}, deregistering={" + mDeregisteringTags + "}, deregistered={"
+                + mDeregisteredTags + "}}";
+    }
 }