[SMALLFIX] Import class type before code class

### What changes are proposed in this pull request?

Import class type before code class

### Why are the changes needed?

Please clarify why the changes are needed. For instance,
1. If you propose a new API, clarify the use case for a new API.
2. If you fix a bug, describe the bug.

### Does this PR introduce any user facing changes?

Please list the user-facing changes introduced by your change, including
1. change in user-facing APIs
2. addition or removal of property keys
4. webui
No

pr-link: Alluxio#16768
change-id: cid-d72e58a4052542891dbc13844c23bb110886dbdd

core/client/fs/src/main/java/alluxio/client/file/BaseFileSystem.java

@@ -48,6 +48,7 @@
 import alluxio.grpc.ListStatusPOptions;
 import alluxio.grpc.ListStatusPartialPOptions;
 import alluxio.grpc.LoadMetadataPType;
+import alluxio.grpc.LoadProgressReportFormat;
 import alluxio.grpc.MountPOptions;
 import alluxio.grpc.OpenFilePOptions;
 import alluxio.grpc.RenamePOptions;
@@ -80,6 +81,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
+import java.util.Optional;
 import java.util.function.Consumer;
 import javax.annotation.concurrent.ThreadSafe;
 
@@ -535,7 +537,7 @@ public boolean stopLoad(AlluxioURI path) {
 
   @Override
   public String getLoadProgress(AlluxioURI path,
-      java.util.Optional<alluxio.grpc.LoadProgressReportFormat> format, boolean verbose) {
+      Optional<LoadProgressReportFormat> format, boolean verbose) {
     try (CloseableResource<FileSystemMasterClient> client =
             mFsContext.acquireMasterClientResource()) {
       return client.get().getLoadProgress(path, format, verbose);

core/client/fs/src/main/java/alluxio/client/file/DelegatingFileSystem.java

@@ -29,6 +29,7 @@
 import alluxio.grpc.GetStatusPOptions;
 import alluxio.grpc.ListStatusPOptions;
 import alluxio.grpc.ListStatusPartialPOptions;
+import alluxio.grpc.LoadProgressReportFormat;
 import alluxio.grpc.MountPOptions;
 import alluxio.grpc.OpenFilePOptions;
 import alluxio.grpc.RenamePOptions;
@@ -45,6 +46,7 @@
 import java.io.IOException;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.function.Consumer;
 
 /**
@@ -254,7 +256,7 @@ public boolean stopLoad(AlluxioURI path) {
 
   @Override
   public String getLoadProgress(AlluxioURI path,
-      java.util.Optional<alluxio.grpc.LoadProgressReportFormat> format, boolean verbose) {
+      Optional<LoadProgressReportFormat> format, boolean verbose) {
     return mDelegatedFileSystem.getLoadProgress(path, format, verbose);
   }
 

core/client/fs/src/main/java/alluxio/client/file/FileSystem.java

@@ -41,6 +41,7 @@
 import alluxio.grpc.ListStatusPartialPOptions;
 import alluxio.grpc.LoadMetadataPOptions;
 import alluxio.grpc.LoadMetadataPType;
+import alluxio.grpc.LoadProgressReportFormat;
 import alluxio.grpc.MountPOptions;
 import alluxio.grpc.OpenFilePOptions;
 import alluxio.grpc.RenamePOptions;
@@ -67,6 +68,7 @@
 import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Consumer;
 import javax.security.auth.Subject;
@@ -764,5 +766,5 @@ boolean submitLoad(AlluxioURI path, java.util.OptionalLong bandwidth,
    * @return the load job progress
    */
   String getLoadProgress(AlluxioURI path,
-      java.util.Optional<alluxio.grpc.LoadProgressReportFormat> format, boolean verbose);
+      Optional<LoadProgressReportFormat> format, boolean verbose);
 }

core/client/fs/src/main/java/alluxio/client/file/ufs/UfsBaseFileSystem.java

@@ -32,6 +32,7 @@
 import alluxio.grpc.GetStatusPOptions;
 import alluxio.grpc.ListStatusPOptions;
 import alluxio.grpc.ListStatusPartialPOptions;
+import alluxio.grpc.LoadProgressReportFormat;
 import alluxio.grpc.MountPOptions;
 import alluxio.grpc.OpenFilePOptions;
 import alluxio.grpc.RenamePOptions;
@@ -71,6 +72,8 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
+import java.util.OptionalLong;
 import java.util.function.Consumer;
 import java.util.stream.Collectors;
 import javax.annotation.concurrent.ThreadSafe;
@@ -393,7 +396,7 @@ public void needsSync(AlluxioURI path) throws IOException, AlluxioException {
   }
 
   @Override
-  public boolean submitLoad(AlluxioURI path, java.util.OptionalLong bandwidth,
+  public boolean submitLoad(AlluxioURI path, OptionalLong bandwidth,
       boolean usePartialListing, boolean verify) {
     throw new UnsupportedOperationException();
   }
@@ -405,7 +408,7 @@ public boolean stopLoad(AlluxioURI path) {
 
   @Override
   public String getLoadProgress(AlluxioURI path,
-      java.util.Optional<alluxio.grpc.LoadProgressReportFormat> format, boolean verbose) {
+      Optional<LoadProgressReportFormat> format, boolean verbose) {
     throw new UnsupportedOperationException();
   }
 

core/client/fs/src/test/java/alluxio/client/file/cache/LocalCacheFileInStreamTest.java

@@ -41,6 +41,7 @@
 import alluxio.grpc.GetStatusPOptions;
 import alluxio.grpc.ListStatusPOptions;
 import alluxio.grpc.ListStatusPartialPOptions;
+import alluxio.grpc.LoadProgressReportFormat;
 import alluxio.grpc.MountPOptions;
 import alluxio.grpc.OpenFilePOptions;
 import alluxio.grpc.RenamePOptions;
@@ -81,6 +82,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Random;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.function.BiConsumer;
@@ -875,7 +877,7 @@ public boolean stopLoad(AlluxioURI path) {
 
     @Override
     public String getLoadProgress(AlluxioURI path,
-        java.util.Optional<alluxio.grpc.LoadProgressReportFormat> format, boolean verbose) {
+        Optional<LoadProgressReportFormat> format, boolean verbose) {
       throw new UnsupportedOperationException();
     }
 

integration/fuse/src/test/java/alluxio/fuse/auth/AbstractAuthPolicyTest.java

@@ -33,6 +33,7 @@
 import alluxio.grpc.GetStatusPOptions;
 import alluxio.grpc.ListStatusPOptions;
 import alluxio.grpc.ListStatusPartialPOptions;
+import alluxio.grpc.LoadProgressReportFormat;
 import alluxio.grpc.MountPOptions;
 import alluxio.grpc.OpenFilePOptions;
 import alluxio.grpc.RenamePOptions;
@@ -309,7 +310,7 @@ public boolean stopLoad(AlluxioURI path) {
 
     @Override
     public String getLoadProgress(AlluxioURI path,
-        Optional<alluxio.grpc.LoadProgressReportFormat> format, boolean verbose) {
+        Optional<LoadProgressReportFormat> format, boolean verbose) {
       throw new UnsupportedOperationException();
     }