Use consistent icon for "Gallery"

[snowtimeglass]

Purpose / Description

The "Gallery" icons are inconsistent in the app.

Approach

For the "Gallery" item in Image Occlusion buttons, use the same icon with the "Gallery" icon in the "Attach multimedia content" bottomsheet.

How Has This Been Tested?

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[snowtimeglass]

I'm sorry. I misunderstood that there was nothing I could do about that lint error. In fact, it was possible to address it.

[david-allison]

I don't think this looks good. The icon styles are now inconsistent on the buttons in the Note Editor (filled vs outline).

I think this is better: (image - outlined) - https://fonts.google.com/icons?selected=Material+Symbols+Outlined:image:FILL@0;wght@400;GRAD@0;opsz@24&icon.query=gallery&icon.size=24&icon.color=%23e8eaed