[Enhancement][UI] Enhanced Full-functional Image Viewer for Images Attached in Comments (InfinityLoop1308#31)

Replace `PictureDialog` with `ImageViewerActivity`, ~borrowed from my other projects~.

Thanks to [com.github.chrisbanes:PhotoView](https://github.com/Baseflow/PhotoView), now this image detail dialog (activity) can:
- Full screen
- Zoom
- Swipe to switch
- Download / Copy URI / Open in browser

Reviewed-on: https://codeberg.org/NullPointerException/PipePipeClient/pulls/31
Co-authored-by: chr56 <chr0056@gmail.com>
Co-committed-by: chr56 <chr0056@gmail.com>

Author: chr56

app/build.gradle

@@ -287,6 +287,9 @@ dependencies {
     // File picker
     implementation "com.nononsenseapps:filepicker:4.2.1"
 
+    // Image Viewer: PhotoView
+    implementation "com.github.chrisbanes:PhotoView:2.3.0"
+
     // Crash reporting
     implementation "ch.acra:acra-core:5.9.1"
 

app/src/main/AndroidManifest.xml

@@ -122,6 +122,10 @@
             </intent-filter>
         </activity>
 
+        <activity
+            android:name=".util.ImageViewerActivity"
+            android:theme="@style/BlackTheme" />
+
         <activity
             android:name=".error.ReCaptchaActivity"
             android:label="@string/recaptcha" />

app/src/main/java/org/schabi/newpipe/info_list/dialog/PictureDialog.kt

@@ -6,15 +6,13 @@
 import android.widget.ImageView;
 import android.widget.TextView;
 
-import androidx.fragment.app.FragmentActivity;
-
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.extractor.Image;
 import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
 import org.schabi.newpipe.info_list.InfoItemBuilder;
-import org.schabi.newpipe.info_list.dialog.PictureDialog;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
+import org.schabi.newpipe.util.ImageViewerActivity;
 
 import java.util.Collection;
 
@@ -76,15 +74,7 @@ public void updateFromItem(final InfoItem infoItem,
                     itemViewImageView.getContext().getString(R.string.button_view_pictures, pictures.size())
             );
             itemViewImageView.setOnClickListener(v -> {
-                PictureDialog pictureDialog = PictureDialog.from(pictures);
-
-                if (itemBuilder != null && itemBuilder.getContext() instanceof FragmentActivity) {
-                    pictureDialog.show(
-                            ((FragmentActivity) itemBuilder.getContext()).getSupportFragmentManager(),
-                            "PICTURE_DIALOG"
-                    );
-                }
-
+                v.getContext().startActivity(ImageViewerActivity.intent(v.getContext(), pictures));
             });
         } else {
             itemViewImageView.setVisibility(View.GONE);