Fix NPE in Call.

Bug: b/308935922
Test: make
Change-Id: I7347d684eb6adc46d833b7992444fb93c3828e59
diff --git a/src/com/android/server/telecom/Call.java b/src/com/android/server/telecom/Call.java
index d095522..08a0532 100644
--- a/src/com/android/server/telecom/Call.java
+++ b/src/com/android/server/telecom/Call.java
@@ -306,14 +306,20 @@
                 @Override
                 public void onCallerInfoQueryComplete(Uri handle, CallerInfo callerInfo) {
                     synchronized (mLock) {
-                        Call.this.setCallerInfo(handle, callerInfo);
+                        Call call = Call.this;
+                        if (call != null) {
+                            call.setCallerInfo(handle, callerInfo);
+                        }
                     }
                 }
 
                 @Override
                 public void onContactPhotoQueryComplete(Uri handle, CallerInfo callerInfo) {
                     synchronized (mLock) {
-                        Call.this.setCallerInfo(handle, callerInfo);
+                        Call call = Call.this;
+                        if (call != null) {
+                            call.setCallerInfo(handle, callerInfo);
+                        }
                     }
                 }
             };