Improve organization of glide packages.

Generic image processing classes were scattered alongside Signal-specific Glide code across multiple packages: `org.signal.glide`, `org.thoughtcrime.securesms.glide` and `org.thoughtcrime.securesms.mms`.

This change provides a clearer separation of concerns:
- `org.signal.glide` contains generic image loading components
- `org.thoughtcrime.securesms.glide` contains Signal-specific Glide integrations
- Feature-specific loaders are moved to their respective domain packages (e.g. `.badges`, `.contacts`)

app/src/main/java/org/thoughtcrime/securesms/contacts/avatars/ContactPhotoFetcher.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.contacts.avatars;
+
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+
+import com.bumptech.glide.Priority;
+import com.bumptech.glide.load.DataSource;
+import com.bumptech.glide.load.data.DataFetcher;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+class ContactPhotoFetcher implements DataFetcher<InputStream> {
+
+  private final Context   context;
+  private final ContactPhoto contactPhoto;
+
+  private InputStream inputStream;
+
+  ContactPhotoFetcher(@NonNull Context context, @NonNull ContactPhoto contactPhoto) {
+    this.context      = context.getApplicationContext();
+    this.contactPhoto = contactPhoto;
+  }
+
+  @Override
+  public void loadData(@NonNull Priority priority, @NonNull DataCallback<? super InputStream> callback) {
+    try {
+      inputStream = contactPhoto.openInputStream(context);
+      callback.onDataReady(inputStream);
+    } catch (FileNotFoundException e) {
+      callback.onDataReady(null);
+    } catch (IOException e) {
+      callback.onLoadFailed(e);
+    }
+  }
+
+  @Override
+  public void cleanup() {
+    try {
+      if (inputStream != null) inputStream.close();
+    } catch (IOException e) {}
+  }
+
+  @Override
+  public void cancel() {
+
+  }
+
+  @Override
+  public @NonNull Class<InputStream> getDataClass() {
+    return InputStream.class;
+  }
+
+  @Override
+  public @NonNull DataSource getDataSource() {
+    return DataSource.LOCAL;
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/contacts/avatars/ContactPhotoLoader.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.contacts.avatars;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.bumptech.glide.load.Options;
+import com.bumptech.glide.load.model.ModelLoader;
+import com.bumptech.glide.load.model.ModelLoaderFactory;
+import com.bumptech.glide.load.model.MultiModelLoaderFactory;
+
+import java.io.InputStream;
+
+public class ContactPhotoLoader implements ModelLoader<ContactPhoto, InputStream> {
+
+  private final Context context;
+
+  private ContactPhotoLoader(Context context) {
+    this.context = context;
+  }
+
+  @Override
+  public @Nullable LoadData<InputStream> buildLoadData(@NonNull ContactPhoto contactPhoto, int width, int height, @NonNull Options options) {
+    return new LoadData<>(contactPhoto, new ContactPhotoFetcher(context, contactPhoto));
+  }
+
+  @Override
+  public boolean handles(@NonNull ContactPhoto contactPhoto) {
+    return true;
+  }
+
+  public static class Factory implements ModelLoaderFactory<ContactPhoto, InputStream> {
+
+    private final Context context;
+
+    public Factory(Context context) {
+      this.context = context.getApplicationContext();
+    }
+
+    @Override
+    public @NonNull ModelLoader<ContactPhoto, InputStream> build(@NonNull MultiModelLoaderFactory multiFactory) {
+      return new ContactPhotoLoader(context);
+    }
+
+    @Override
+    public void teardown() {}
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/contacts/avatars/ContactPhotoLocalUriFetcher.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.contacts.avatars;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.net.Uri;
+import android.os.Build.VERSION;
+import android.os.Build.VERSION_CODES;
+import android.provider.ContactsContract;
+
+import com.bumptech.glide.load.data.StreamLocalUriFetcher;
+
+import org.signal.core.util.logging.Log;
+
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+
+class ContactPhotoLocalUriFetcher extends StreamLocalUriFetcher {
+
+  private static final String TAG = Log.tag(ContactPhotoLocalUriFetcher.class);
+
+  ContactPhotoLocalUriFetcher(Context context, Uri uri) {
+    super(context.getContentResolver(), uri);
+  }
+
+  @Override
+  protected InputStream loadResource(Uri uri, ContentResolver contentResolver)
+      throws FileNotFoundException
+  {
+    if (VERSION.SDK_INT >= VERSION_CODES.ICE_CREAM_SANDWICH) {
+      return ContactsContract.Contacts.openContactPhotoInputStream(contentResolver, uri, true);
+    } else {
+      return ContactsContract.Contacts.openContactPhotoInputStream(contentResolver, uri);
+    }
+  }
+}