FR: Logging Examples

[lesv]

Logging needs:

1. To use new updater to maintain Javadocs in sync w/ the snippets & example code.
2. Snippets and examples should be runnable (like datastore), and have tags // [START section] & // [END section]
3. needs to update_a_log_sink sample

[mziccard]

1. Snippets and examples should be runnable (like datastore)

They already are runnable

[mziccard]

This was fixed in #1204 #1221 and #1222