Bump GeckoView to 70.0.20190710094220 (Fixes #1335) (#1385)

Author: bluemarvin

versions.gradle

@@ -24,7 +24,7 @@ ext.deps = [:]
 def versions = [:]
 // GeckoView versions can be found here:
 // https://maven.mozilla.org/?prefix=maven2/org/mozilla/geckoview/
-versions.gecko_view = "69.0.20190530094559"
+versions.gecko_view = "70.0.20190710094220"
 versions.android_components = "0.52.0"
 versions.mozilla_speech = "1.0.6"
 versions.openwnn = "1.3.7"