Some configs updates for vanilla 2 plugin

* Update hidden configs list
* Update priority one configs list

Change-Id: I123f0c4ac2a142e559e250bbd8b00131e3825268
Standardize README header

Change-Id: I897abb29338c373b36b8ceb6b6eb89be3dbd00e8
Merge "Standardize README header"
Merge "Some configs updates for vanilla 2 plugin"