Jetpack: Backup Download Notice Banner Action Button Tapped Tracking

[zwarm]

Add four new collection points to track button taps from the notice banner. The following were added in WPAndroid release 16.8.

Within Backup List
JETPACK_BACKUP_DOWNLOAD_FILE_NOTICE_DOWNLOAD_TAPPED
JETPACK_BACKUP_DOWNLOAD_FILE_NOTICE_DISMISSED_TAPPED

Within Activity Log List
ACTIVITY_LOG_DOWNLOAD_FILE_NOTICE_DOWNLOAD_TAPPED
ACTIVITY_LOG_DOWNLOAD_FILE_NOTICE_DISMISSED_TAPPED

cc @emilylaguna

[dangermattic]

Thanks for reporting! 👍