Added Compose adaptive layouts snippets

[IanGClifton]

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[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• compose/snippets/src/main/java/com/example/compose/snippets/adaptivelayouts/SampleListDetailPaneScaffold.kt:48, tag android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part02
• compose/snippets/src/main/java/com/example/compose/snippets/adaptivelayouts/SampleListDetailPaneScaffold.kt:52, tag android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part01
• compose/snippets/src/main/java/com/example/compose/snippets/adaptivelayouts/SampleListDetailPaneScaffold.kt:56, tag android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part03
• compose/snippets/src/main/java/com/example/compose/snippets/adaptivelayouts/SampleListDetailPaneScaffold.kt:67, tag android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part04
• compose/snippets/src/main/java/com/example/compose/snippets/adaptivelayouts/SampleListDetailPaneScaffold.kt:87, tag android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part05
• compose/snippets/src/main/java/com/example/compose/snippets/adaptivelayouts/SampleListDetailPaneScaffold.kt:107, tag android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_full

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