Issue #3666: Apply useWideViewPort to WebSetting

components/browser/engine-system/src/main/java/mozilla/components/browser/engine/system/SystemEngineSession.kt

@@ -281,6 +281,7 @@ class SystemEngineSession(
             override var userAgentString by WebSetting(s::getUserAgentString, s::setUserAgentString)
             override var displayZoomControls by WebSetting(s::getDisplayZoomControls, s::setDisplayZoomControls)
             override var loadWithOverviewMode by WebSetting(s::getLoadWithOverviewMode, s::setLoadWithOverviewMode)
+            override var useWideViewPort by WebSetting(s::getUseWideViewPort, s::setUseWideViewPort)
             override var supportMultipleWindows by WebSetting(s::supportMultipleWindows, s::setSupportMultipleWindows)
             override var allowFileAccessFromFileURLs by WebSetting(
                     s::getAllowFileAccessFromFileURLs, s::setAllowFileAccessFromFileURLs)

components/browser/engine-system/src/test/java/mozilla/components/browser/engine/system/SystemEngineSessionTest.kt

@@ -637,7 +637,8 @@ class SystemEngineSessionTest {
     @Test
     fun desktopMode() {
         val userAgentMobile = "Mozilla/5.0 (Linux; Android 9) AppleWebKit/537.36 Mobile Safari/537.36"
-        val engineSession = spy(SystemEngineSession(testContext))
+        val defaultSettings = DefaultSettings()
+        val engineSession = spy(SystemEngineSession(testContext, defaultSettings))
         val webView = mock<WebView>()
         val webViewSettings = mock<WebSettings>()
         var desktopMode = false