[Components] Fix typo when logging error (#7643)

The previous message was "Class %s is not an found." and it should be
""Class %s was not found."

Author: rlazo

firebase-components/CHANGELOG.md

@@ -1,5 +1,7 @@
 # Unreleased
 
+- [fixed] fixed typo in message logged when a class is not found during component discovery.
+
 # 19.0.0
 
 - [changed] **Breaking Change**: Updated minSdkVersion to API level 23 or higher.

firebase-components/src/main/java/com/google/firebase/components/ComponentDiscovery.java

@@ -125,7 +125,8 @@ private static ComponentRegistrar instantiate(String registrarName) {
       }
       return (ComponentRegistrar) loadedClass.getDeclaredConstructor().newInstance();
     } catch (ClassNotFoundException e) {
-      Log.w(TAG, String.format("Class %s is not an found.", registrarName));
+      Log.w(TAG, String.format("Class %s was not found.", registrarName));
+
       return null;
     } catch (IllegalAccessException e) {
       throw new InvalidRegistrarException(