Don't override contactExists if there is no update from Cequint Caller ID.

Bug: 72485878
Test: none
PiperOrigin-RevId: 183915863
Change-Id: Ib035855d944c91145418222cc390be066744b4fb
diff --git a/java/com/android/incallui/ContactInfoCache.java b/java/com/android/incallui/ContactInfoCache.java
index fc41df4..d2ae709 100644
--- a/java/com/android/incallui/ContactInfoCache.java
+++ b/java/com/android/incallui/ContactInfoCache.java
@@ -541,7 +541,9 @@
       hasUpdate = true;
     }
     // Set contact to exist to avoid phone number service lookup.
-    callerInfo.contactExists = hasUpdate;
+    if (hasUpdate) {
+      callerInfo.contactExists = true;
+    }
   }
 
   /**