Adds Wear module and voice input snippet

[kul3r4]

• Adds a Wear module
• Adds a snippet to replace outdated code in https://developer.android.com/training/wearables/user-input/voice#kotlin

[snippet-bot[bot]]

Here is the summary of changes.

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- [wear/src/main/java/com/example/wear/snippets/voiceinput/VoiceInputScreen.kt:66](https://github.com/android/snippets/blob/2f6441ceefecf3f562f491fa7d7f341f5d4db66c/wear/src/main/java/com/example/wear/snippets/voiceinput/VoiceInputScreen.kt#L66), tag `android_wear_voice_input`

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