Change log message to reference FID instead of IID (#5680)

* Change log message to reference FID instead of IID

* Add CHANGELOG entry

* Slight changelog tweak

Author: christibbs

FirebaseInAppMessaging/CHANGELOG.md

@@ -1,3 +1,6 @@
+# 2020-06-02 -- v0.20.2
+- [fixed] Fixed log message for in-app messaging test on device flow (#5680).
+
 # 2020-05-19 -- v0.20.1
 - [fixed] Fixed an issue where clicks were counted for messages with no action URL (#5564).
 

FirebaseInAppMessaging/Sources/Runtime/FIRIAMRuntimeManager.m

@@ -385,18 +385,20 @@ - (void)internalStartRuntimeWithSDKSettings:(FIRIAMSDKSettings *)settings {
                                                                          NSString
                                                                              *_Nullable FISToken,
                                                                          NSError *_Nullable error) {
-                                                                       // Always dump the instance
-                                                                       // id into log on startup to
-                                                                       // help developers to find it
-                                                                       // for their app instance.
+                                                                       // Always dump the
+                                                                       // installation ID into log
+                                                                       // on startup to help
+                                                                       // developers to find it for
+                                                                       // their app instance.
                                                                        FIRLogDebug(
                                                                            kFIRLoggerInAppMessaging,
                                                                            @"I-IAM180017",
                                                                            @"Starting "
                                                                            @"InAppMessaging "
                                                                            @"runtime "
                                                                            @"with "
-                                                                            "Instance ID %@",
+                                                                            "Firebase Installation "
+                                                                            "ID %@",
                                                                            FID);
                                                                      }];