fix: enable v2.LogEntry Protobufs converter functions (#1509)

* fix: enable v2.LogEntry Protobufs converter

* fix formatting

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: cindy-peng <cindypeng@google.com>
Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

google-cloud-logging/src/main/java/com/google/cloud/logging/LogEntry.java

@@ -760,7 +760,7 @@ public static LogEntry of(String logName, MonitoredResource resource, Payload<?>
     return newBuilder(payload).setLogName(logName).setResource(resource).build();
   }
 
-  static LogEntry fromPb(com.google.logging.v2.LogEntry entryPb) {
+  public static LogEntry fromPb(com.google.logging.v2.LogEntry entryPb) {
     Builder builder = newBuilder(Payload.fromPb(entryPb));
     builder.setLabels(entryPb.getLabelsMap());
     builder.setSeverity(Severity.fromPb(entryPb.getSeverity()));
@@ -805,7 +805,8 @@ static LogEntry fromPb(com.google.logging.v2.LogEntry entryPb) {
     return builder.build();
   }
 
-  static Function<LogEntry, com.google.logging.v2.LogEntry> toPbFunction(final String projectId) {
+  public static Function<LogEntry, com.google.logging.v2.LogEntry> toPbFunction(
+      final String projectId) {
     return (LogEntry entry) -> {
       return entry.toPb(projectId);
     };