Add additional checks around link preview domains.

We never make requests to non-whitelisted domains, but there were
situations where some links would redirect to non-whitelisted domains,
which would hit a final failsafe that resulted in a crash.

To prevent this, we detect bad redirects earlier and fail more
gracefully.

Fixes #8796

src/org/thoughtcrime/securesms/glide/ChunkedImageUrlLoader.java

@@ -8,6 +8,7 @@ import com.bumptech.glide.load.model.ModelLoaderFactory;
 import com.bumptech.glide.load.model.MultiModelLoaderFactory;
 
 import org.thoughtcrime.securesms.giph.model.ChunkedImageUrl;
+import org.thoughtcrime.securesms.net.ContentProxySafetyInterceptor;
 import org.thoughtcrime.securesms.net.ContentProxySelector;
 
 import java.io.InputStream;
@@ -41,6 +42,7 @@ public class ChunkedImageUrlLoader implements ModelLoader<ChunkedImageUrl, Input
       this.client  = new OkHttpClient.Builder()
                                      .proxySelector(new ContentProxySelector())
                                      .cache(null)
+                                     .addNetworkInterceptor(new ContentProxySafetyInterceptor())
                                      .addNetworkInterceptor(new PaddedHeadersInterceptor())
                                      .build();
     }