Adds complications snippets

[garanj]

Adds complications snippets for use in undating the complications DAC guidance

[snippet-bot]

Here is the summary of changes.

You are about to add 4 region tags.

• wear/src/main/AndroidManifest.xml:204, tag android_wear_complication_manifest
• wear/src/main/AndroidManifest.xml:224, tag android_wear_timeline_complication_manifest
• wear/src/main/java/com/example/wear/snippets/complication/MyComplicationDataSourceService.kt:26, tag android_wear_complication
• wear/src/main/java/com/example/wear/snippets/complication/MyTimelineComplicationDataSourceService.kt:38, tag android_wear_timeline_complication

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