fix(example): fix fatal hangs and ANR crash buttons (#1154)

Jira ID: APM-19536

Author: abdelhamid-f-nasser

examples/default/android/app/src/main/java/com/instabug/react/example/RNInstabugExampleCrashReportingModule.java

@@ -1,29 +1,20 @@
 package com.instabug.react.example;
 
-import static com.instabug.reactlibrary.utils.InstabugUtil.getMethod;
-
-import com.facebook.react.bridge.Promise;
+import android.content.Context;
+import android.os.Handler;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
 import com.facebook.react.bridge.ReactMethod;
 import com.instabug.crash.CrashReporting;
 import com.instabug.crash.models.IBGNonFatalException;
-import com.instabug.library.Feature;
+import com.instabug.library.Instabug;
 import com.instabug.react.example.nativeLibs.CppNativeLib;
-import com.instabug.reactlibrary.RNInstabugReactnativeModule;
-import com.instabug.reactlibrary.utils.MainThreadHandler;
-
-import org.json.JSONObject;
 
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
+import javax.annotation.Nonnull;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Random;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
 public class RNInstabugExampleCrashReportingModule extends ReactContextBaseJavaModule {
 
     public RNInstabugExampleCrashReportingModule(ReactApplicationContext reactApplicationContext) {
@@ -51,20 +42,28 @@ public void sendNativeFatalCrash() {
 
     @ReactMethod
     public void sendANR() {
-        try {
-            Thread.sleep(20000);
-        } catch (InterruptedException e) {
-            throw new RuntimeException(e);
-        }
+        sendHang(20000);
     }
 
     @ReactMethod
     public void sendFatalHang() {
-        try {
-            Thread.sleep(3000);
-        } catch (InterruptedException e) {
-            throw new RuntimeException(e);
-        }
+        sendHang(3000);
+    }
+
+    private void sendHang(long duration) {
+        Context applicationContext = Instabug.getApplicationContext();
+        if (applicationContext == null)
+            return;
+
+        Handler handler = new Handler(applicationContext.getMainLooper());
+
+        handler.post(() -> {
+            try {
+                Thread.sleep(duration);
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        });
     }
 
     @ReactMethod