Update the Android OkHttp instrumentation docs and fix some Otel docs

Author: mariusc83

content/en/real_user_monitoring/mobile_and_tv_monitoring/android/setup.md

@@ -417,8 +417,31 @@ OkHttpClient okHttpClient = new OkHttpClient.Builder()
 {{% /tab %}}
 {{< /tabs >}}
 
+If you want RUM resources and Spans to be automatically created for your OkHttp requests, you can use the `DatadogInterceptor` as an interceptor.
+
 This records each request processed by the `OkHttpClient` as a resource, with all the relevant information (URL, method, status code, and error) automatically filled in. Only the network requests that started when a view is active are tracked. To track requests when your application is in the background, [create a view manually][13].
 
+In case you want to monitor the network redirects or retries, you can use the `DatadogInterceptor` as a network interceptor.
+
+{{< tabs >}}
+{{% tab "Kotlin" %}}
+```kotlin
+val okHttpClient = OkHttpClient.Builder()
+    .addNetworkInterceptor(DatadogInterceptor.Builder(tracedHostsWithHeaderType).build())
+    .build()
+```
+{{% /tab %}}
+{{% tab "Java" %}}
+```java
+OkHttpClient okHttpClient = new OkHttpClient.Builder()
+    .addNetworkInterceptor(new DatadogInterceptor.Builder(tracedHostsWithHeaderType).build())
+    .build();
+```
+{{% /tab %}}
+{{< /tabs >}}
+
+**Note**: In case you only want to have Spans without RUM resources, you can use the `TracingInterceptor` instead of `DatadogInterceptor` the same way we explained above.
+
 **Note**: If you also use multiple Interceptors, add `DatadogInterceptor` first.
 
 You can also add an `EventListener` for the `OkHttpClient` to [automatically track resource timing][14] for third-party providers and network requests.

content/en/tracing/trace_collection/custom_instrumentation/android/otel.md

@@ -335,7 +335,7 @@ GlobalOpenTelemetry.set(object : OpenTelemetry {
     }
 })
 // and later on if you want to access the tracer provider
-val tracerProvider = GlobalOpenTelemetry.get().getTracer(instrumentationName = "<instrumentation_name>")
+val tracer = GlobalOpenTelemetry.get().getTracer(instrumentationName = "<instrumentation_name>")
 ```
 {{% /tab %}}
 {{% tab "Java" %}}
@@ -356,7 +356,7 @@ GlobalOpenTelemetry.set(new OpenTelemetry() {
     }
 });
 // and later on if you want to access the tracer provider
-final TracerProvider tracerProvider = GlobalOpenTelemetry.get().getTracer("<instrumentation_name>");       
+final Tracer tracer = GlobalOpenTelemetry.get().getTracer("<instrumentation_name>");       
 ```
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 {{< /tabs >}}