[TMP] Completely kill app instead of activity only

Since v0.21.0 release, the (Message)ColorProvider seems to keep an
outdated context, so upon theme change, the color doesn't update.
As a workaround until a better solution is found, kill the complete
process to enforce new context references everywhere.

vector/src/main/java/im/vector/riotx/core/platform/VectorBaseActivity.kt

@@ -188,7 +188,8 @@ abstract class VectorBaseActivity : AppCompatActivity(), HasScreenInjector {
             if (!it.hasBeenHandled) {
                 // Recreate the Activity because configuration has changed
                 startActivity(intent)
-                finish()
+                //finish()
+                Runtime.getRuntime().exit(0)
             }
         })