Crashlytics add more clarifying information to unsent reports log (#9784)

Author: samedson

Crashlytics/Crashlytics/Controllers/FIRCLSExistingReportManager.m

@@ -151,9 +151,12 @@ - (NSUInteger)unsentReportsCount {
   // which should be at the start of the array.
   if (validReports.count > FIRCLSMaxUnsentReports) {
     NSUInteger deletingCount = validReports.count - FIRCLSMaxUnsentReports;
-    FIRCLSInfoLog(@"Deleting %lu unsent reports over the limit of %lu to prevent disk space from "
-                  @"filling up. To prevent this make sure to call send/deleteUnsentReports.",
-                  deletingCount, FIRCLSMaxUnsentReports);
+    FIRCLSInfoLog(
+        @"Automatic data collection is disabled. Deleting %lu unsent reports over the limit of %lu "
+        @"to prevent disk space from "
+        @"filling up. To take action on these reports, call send/deleteUnsentReports. To turn on "
+        @"automatic data collection, call setCrashlyticsCollectionEnabled with true",
+        deletingCount, FIRCLSMaxUnsentReports);
   }
 
   // Not that validReports is sorted, delete any reports at indices > MAX_UNSENT_REPORTS, and