Completely Disable Activity Stream on Android
Similar to #30846 (moved), but on Android the ActivityStream is not shown sometimes. This was originally prevented here, and now in 68esr that piece of code was squashed into the .mozconfig and branding patch.
This small patch prevents showing the ActivityStream screen when the URL is first pressed (and the url bar is enters "Editing" mode), however there exist other ways of accessing the ActivityStream screen. In particular, showBrowserApp() is called when the text is typed into the url bar and then it is completely deleted and when the user configures about:home as their default new tab page.