android: disable delta updates

It's enabled by default, but marked as experimental (uh?!). It creates trouble
as sometimes the packager goes bananas. Disable them until further notice, our
bundle is not that large anyway.

android/sdk/src/main/java/org/jitsi/meet/sdk/ReactInstanceManagerHolder.java

@@ -1,5 +1,6 @@
 /*
- * Copyright @ 2017-present Atlassian Pty Ltd
+ * Copyright @ 2019-present 8x8, Inc.
+ * Copyright @ 2017-2018 Atlassian Pty Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,6 +25,7 @@ import com.facebook.react.bridge.NativeModule;
 import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.common.LifecycleState;
+import com.facebook.react.devsupport.DevInternalSettings;
 import com.facebook.react.modules.core.DeviceEventManagerModule;
 
 import java.util.ArrayList;
@@ -155,5 +157,12 @@ class ReactInstanceManagerHolder {
                 .setUseDeveloperSupport(BuildConfig.DEBUG)
                 .setInitialLifecycleState(LifecycleState.RESUMED)
                 .build();
+
+        // Disable delta updates on Android, they have caused trouble.
+        DevInternalSettings devSettings
+            = (DevInternalSettings)reactInstanceManager.getDevSupportManager().getDevSettings();
+        if (devSettings != null) {
+            devSettings.setBundleDeltasEnabled(false);
+        }
     }
 }