Changes

GeckoViewExample is an example app that [https://searchfox.org/mozilla-central/source/mobile/android/geckoview_example/src/main/java/org/mozilla/geckoview_example/GeckoViewActivity.java lives in mozilla-central] and lets you easily exercise GeckoView. You can build/install it with the following gradle command: <pre>mach gradle geckoview_example:installLocalWithGeckoBinariesNoMinApiDebug</pre> You may find it easier to do this from Android Studio, where geckoview_example appears as a module. Firefox Focus also has a build variant that uses Gecko. To build, check out the Focus code from <code>https://github.com/mozilla-mobile/focus-android</code> and follow the [https://github.com/mozilla-mobile/focus-android/blob/master/README.md instructions]. The only difference is you need to select one of the Gecko build variants from the Android Studio 'Build' menu.