Merge "Merge "Merge "CTS: Update and clarify WebView useragent test." into nougat-cts-dev am: 561b585834" into nougat-mr1-cts-dev am: 47ddfb6f68" into oreo-cts-dev
am: 17877bf910

Change-Id: Ifefe96cda2e64c4f1146c7e428e705488cab2af9