am 85a0385c: am 5c7b9495: am 93bd8134: am eae09b4a: Merge "docs: Updated Android TV landing page and Live TV training to support channels. bug: 21786387" into mnc-preview-docs

* commit '85a0385ce4aa44d5ae2de13007e5fd90b1d19cf0':
  docs: Updated Android TV landing page and Live TV training to support channels. bug: 21786387