[Dialogs] Try to fix testActionsAreOrderedByEmphasis snapshot

[andrewoverton]

I just tried checking out develop and I got this, which I've seen many times before:

Encountered 1 file(s) that should have been pointers, but weren't:
snapshot_test_goldens/goldens_64/MDCAlertControllerActionsTests/testActionsAreOrderedByEmphasis_11_2@2x.png

I tried regenerating the snapshot and looking at the comparison on GitHub. I couldn't preview the snapshot. I can't remember if you're supposed to be able to preview the snapshot after replacing a binary file with a Git LFS file...

I looked at the PR the problematic snapshot was added in and saw that I was able to preview it there. I wasn't expecting this, because up to this point I thought that if you could preview the snapshot in the PR that meant everything was good. I guess not? It said it was a binary file, and not a git LFS file. I also noticed the PR was exported from an internal CL. So I guess if you export a CL to a PR and it has a binary snapshot you can preview it, but that doesn't mean it should be merged.

I tried issuing the following command to fix it:

git lfs migrate import --no-rewrite snapshot_test_goldens/goldens_64/MDCAlertControllerActionsTests/testActionsAreOrderedByEmphasis_11_2@2x.png

That resulted in 224a322. The commit message said it converted the binary file to a Git LFS file, which is good. However, I still couldn't preview it, and I'm used to using that as a test to make sure I've done it correctly, for better or worse. I decided to just rename the test and generate a new snapshot. That's in 10b7b37. Now GitHub says it's a Git LFS file, and I can preview it, so I think this should solve the issue.

[material-automation]

Based on the changes, the title has been prefixed with [Dialogs].

[material-automation]

bazel detected changes to the following targets:

//components/Dialogs:snapshot_tests
//components/Dialogs:snapshot_tests_test_bundle