Disable EnhancedBookmarkImageFetching on Android.

It is trying to load some extension code that it's not available and thus breaking android.

BUG=401921

TBR=sky
NOTRY=true

ran all the linux and android bots but didn't want to wait for the windows ones to finish since it does not affect them and we need to fix the build

Review URL: https://codereview.chromium.org/447403003

Cr-Commit-Position: refs/heads/master@{#288341}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288341 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/bookmarks/enhanced_bookmarks_features.cc

@@ -28,6 +28,9 @@ std::string GetEnhancedBookmarksExtensionIdFromFinch() {
 
 // Returns true if enhanced bookmarks experiment is enabled from Finch.
 bool IsEnhancedBookmarksExperimentEnabledFromFinch() {
+#if defined(OS_ANDROID)
+  return false;
+#endif
   std::string ext_id = GetEnhancedBookmarksExtensionIdFromFinch();
   const extensions::FeatureProvider* feature_provider =
       extensions::FeatureProvider::GetPermissionFeatures();