Remove artifact files, make new internal api private, and pull in latest changes from main branch.

This should be in a good state to merge after this. We need to followup with a change to create a FirebaseCrashlyticsInternal interface with the new internal api.

Author: mrober

aar/repository/com/google/firebase/firebase-crashlytics-ktx/18.2.9-SNAPSHOT/firebase-crashlytics-ktx-18.2.9-SNAPSHOT-sources.jar

@@ -202,8 +202,8 @@ public void recordException(@NonNull Throwable throwable) {
   }
 
   /** Records a fatal report and sends to Crashlytics on-demand. */
-  // TODO(mrober): Remove this after testing, and let the plugin call CrashlyticsCore directly.
-  public void recordFatalException(Throwable throwable) {
+  // TODO(mrober): Move this to a FirebaseCrashlyticsInternal interface.
+  private void recordFatalException(Throwable throwable) {
     if (throwable == null) {
       Logger.getLogger().w("A null value was passed to recordFatalException. Ignoring.");
       return;