Adds code snippet for https://developer.android.com/quick-guides/cont…

[thedmail]

…ent/display-nested-list?hl=en

[snippet-bot]

Here is the summary of changes.

You are about to add 1 region tag.

• compose/snippets/src/main/java/com/example/compose/snippets/lists/LazyListSnippets.kt:781, tag android_compose_layout_scrollable_grid

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