example apps: disable interface binding (#2456)

Description: Disable interface binding in Android Kotlin example app as we have no clear plans for enabling interface binding anytime soon and having it disabled makes debugging of the example app (and Envoy Mobile) easier. On top of that, the same feature is not enabled in iOS example apps.
Risk Level: None, example app change only.
Testing: Example app run manually.
Docs Changes: N/A
Release Notes: N/A

Signed-off-by: Rafal Augustyniak raugustyniak@lyft.com
Signed-off-by: JP Simard <jp@jpsim.com>

mobile/examples/kotlin/hello_world/MainActivity.kt

@@ -50,7 +50,6 @@ class MainActivity : Activity() {
 
     engine = AndroidEngineBuilder(application)
       .addLogLevel(LogLevel.DEBUG)
-      .enableInterfaceBinding(true)
       .addPlatformFilter(::DemoFilter)
       .addPlatformFilter(::BufferDemoFilter)
       .addPlatformFilter(::AsyncDemoFilter)