Fix autofill_assistant DFM crashing on load

This was because it had an interface with a single implementer in the
DFM, similar to image_editor.

Bug: 1154061
Change-Id: Ie4f1ff1eaa912ffa2f54b08d64c5537d2049f1f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2566340
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Auto-Submit: Clark DuVall <cduvall@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832176}

chrome/android/features/autofill_assistant/public/java/src/org/chromium/chrome/browser/autofill_assistant/AutofillAssistantActionHandler.java

@@ -7,12 +7,16 @@ package org.chromium.chrome.browser.autofill_assistant;
 import android.os.Bundle;
 
 import org.chromium.base.Callback;
+import org.chromium.base.annotations.DoNotInline;
 
 import java.util.List;
 
 /**
  * Interface that provides implementation for AA actions, triggered by direct actions.
  */
+// TODO(crbug.com/1145287): DexSplitter has issues with interfaces that have a single implementer
+// inside a DFM.
+@DoNotInline
 public interface AutofillAssistantActionHandler {
     /**
      * Start fetching potential actions for websites.