[duplicated subtitle] Fix compilation errors after moving from NewPipeExtractor to NewPipe repository.

- Changed `package` and `import` statements to adapt to NewPipe main repository.
- Replace `javax.annotation.Nonnull` with `androidx.annotation.NonNull` for compatibility with `androidx`, replacing `javax`.

Author: TransZAllen

app/src/main/java/org/schabi/newpipe/util/subtitle/SubtitleDeduplicator.java

@@ -1,4 +1,4 @@
-package org.schabi.newpipe.extractor.utils;
+package org.schabi.newpipe.util.subtitle;
 
 import java.io.BufferedReader;
 import java.io.File;
@@ -17,7 +17,7 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import javax.annotation.Nonnull;
+import androidx.annotation.NonNull;
 
 import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.MediaFormat;
@@ -430,13 +430,13 @@ public static SubtitleOrigin getSubtitleOrigin(final boolean autoGenerated,
         return SubtitleOrigin.HUMAN_PROVIDED;
     }
 
-    @Nonnull
+    @NonNull
     private static String buildSubtitleCacheFilename(
-            @Nonnull final String videoId,
-            @Nonnull final String language,
-            @Nonnull final SubtitleOrigin origin,
-            @Nonnull final SubtitleState state,
-            @Nonnull final String extension
+            @NonNull final String videoId,
+            @NonNull final String language,
+            @NonNull final SubtitleOrigin origin,
+            @NonNull final SubtitleState state,
+            @NonNull final String extension
     ) {
         final String filenamePartSeparator = "--";
 
@@ -526,11 +526,11 @@ private static File findStoredCacheFile(
         return null;
     }
 
-    @Nonnull
+    @NonNull
     private static String fallbackToStoredOrRemote(
-            @Nonnull final String remoteSubtitleUrl,
-            @Nonnull final MediaFormat format,
-            @Nonnull final SubtitleOrigin origin
+            @NonNull final String remoteSubtitleUrl,
+            @NonNull final MediaFormat format,
+            @NonNull final SubtitleOrigin origin
     ) {
         final File storedFile = findStoredCacheFile(
                 remoteSubtitleUrl,

app/src/main/java/org/schabi/newpipe/util/subtitle/SubtitleOrigin.java

@@ -1,6 +1,6 @@
-package org.schabi.newpipe.extractor.utils;
+package org.schabi.newpipe.util.subtitle;
 
-import javax.annotation.Nonnull;
+import androidx.annotation.NonNull;
 
 /**
  * Describes the origin of a subtitle -> how its content was produced.
@@ -27,11 +27,11 @@ public enum SubtitleOrigin {
 
     private final String id;
 
-    SubtitleOrigin(@Nonnull final String id) {
+    SubtitleOrigin(@NonNull final String id) {
         this.id = id;
     }
 
-    @Nonnull
+    @NonNull
     public String getId() {
         return id;
     }

app/src/main/java/org/schabi/newpipe/util/subtitle/SubtitleState.java

@@ -1,6 +1,6 @@
-package org.schabi.newpipe.extractor.utils;
+package org.schabi.newpipe.util.subtitle;
 
-import javax.annotation.Nonnull;
+import androidx.annotation.NonNull;
 
 /**
  * Describes the processing state of a subtitle.
@@ -20,11 +20,11 @@ public enum SubtitleState {
 
     private final String id;
 
-    SubtitleState(@Nonnull final String id) {
+    SubtitleState(@NonNull final String id) {
         this.id = id;
     }
 
-    @Nonnull
+    @NonNull
     public String getId() {
         return id;
     }