Fix 5366 - Use VectorDrawableCompat for all imagery

[darkwing]

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Pull Request checklist

• Tests: This PR includes thorough tests or an explanation of why it does not
• Screenshots: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

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• Milestone: Make sure issues finished by this pull request are added to the milestone of the version currently in development.

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[codecov-io]

Codecov Report

Merging #7221 into master will decrease coverage by 0.01%.
The diff coverage is 5%.

@@             Coverage Diff              @@
##             master    #7221      +/-   ##
============================================
- Coverage     18.95%   18.94%   -0.02%     
  Complexity      436      436              
============================================
  Files           288      288              
  Lines         11282    11290       +8     
  Branches       1538     1538              
============================================
  Hits           2139     2139              
- Misses         8981     8989       +8     
  Partials        162      162

Impacted Files	Coverage Δ	Complexity Δ
...x/search/awesomebar/ShortcutsSuggestionProvider.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
...kmarks/selectfolder/SelectBookmarkFolderAdapter.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
.../java/org/mozilla/fenix/utils/ClearableEditText.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
.../bookmarks/viewholders/BookmarkFolderViewHolder.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
...la/fenix/settings/quicksettings/WebsiteInfoView.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
...x/home/sessioncontrol/viewholders/TabViewHolder.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
...main/java/org/mozilla/fenix/settings/Extensions.kt	4.76% <0%> (ø)	0 <0> (ø)	⬇️
...downloads/DownloadNotificationBottomSheetDialog.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
...ozilla/fenix/collections/CollectionCreationView.kt	34.1% <50%> (ø)	6 <0> (ø)	⬇️

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[severinrudie]

This looks like a very safe PR, and if we missed anything we can always follow up. I'm a little more concerned about maintaining this standard going forward though. We should probably look into a linter that will enforce this; these seem like very easy mistakes to make.