manifest: android-8.1.0_r20 -> android-8.1.0_r26

Change-Id: Ib0650e94563f1848b6a046a6cf758aa51044d8f8
1 file changed
tree: 8d45694e4c369fc31e7b37ff89aa62f3199de88d
  1. snippets/
  2. default.xml
  3. README.mkdn