Merge "Merge "Merge "CTS: Update and clarify WebView useragent test." into nougat-cts-dev am: 561b5858" into nougat-mr1-cts-dev am: 47ddfb6f" into oreo-cts-dev am: 17877bf9 Change-Id: Ifefe96cda2e64c4f1146c7e428e705488cab2af9