Add Simultaneous Calling restrictions to PhoneAccount toString

Bug: 319904227
Test: Inspection of toString via adb shell dumpsys telecom
Change-Id: I061f492e8cbb16b6504f668846690fa4d7b3ff31
diff --git a/telecomm/java/android/telecom/PhoneAccount.java b/telecomm/java/android/telecom/PhoneAccount.java
index 63db297..b7706a9 100644
--- a/telecomm/java/android/telecom/PhoneAccount.java
+++ b/telecomm/java/android/telecom/PhoneAccount.java
@@ -1283,6 +1283,17 @@
         sb.append(mExtras);
         sb.append(" GroupId: ");
         sb.append(Log.pii(mGroupId));
+        sb.append(" SC Restrictions: ");
+        if (hasSimultaneousCallingRestriction()) {
+            sb.append("[ ");
+            for (PhoneAccountHandle handle : mSimultaneousCallingRestriction) {
+                sb.append(handle);
+                sb.append(" ");
+            }
+            sb.append("]");
+        } else {
+            sb.append("[NONE]");
+        }
         sb.append("]");
         return sb.toString();
     }