add interceptor and network interceptor support to mapbox speech (#910)

Author: Guardiola31337

services-speech/src/main/java/com/mapbox/api/speech/v1/MapboxSpeech.java

@@ -12,6 +12,7 @@
 import java.util.logging.Logger;
 
 import okhttp3.Cache;
+import okhttp3.Interceptor;
 import okhttp3.OkHttpClient;
 import okhttp3.ResponseBody;
 import okhttp3.logging.HttpLoggingInterceptor;
@@ -54,6 +55,12 @@ protected Call<ResponseBody> initializeCall() {
   @Nullable
   abstract Cache cache();
 
+  @Nullable
+  abstract Interceptor interceptor();
+
+  @Nullable
+  abstract Interceptor networkInterceptor();
+
   @NonNull
   abstract String accessToken();
 
@@ -75,6 +82,12 @@ public synchronized OkHttpClient getOkHttpClient() {
       if (cache() != null) {
         httpClient.cache(cache());
       }
+      if (interceptor() != null) {
+        httpClient.addInterceptor(interceptor());
+      }
+      if (networkInterceptor() != null) {
+        httpClient.addNetworkInterceptor(networkInterceptor());
+      }
 
       okHttpClient = httpClient.build();
     }
@@ -167,6 +180,22 @@ public abstract static class Builder {
      */
     public abstract Builder cache(Cache cache);
 
+    /**
+     * Adds an optional interceptor to set in the OkHttp client.
+     *
+     * @param interceptor to set for OkHttp
+     * @return this builder for chaining options together
+     */
+    public abstract Builder interceptor(Interceptor interceptor);
+
+    /**
+     * Adds an optional network interceptor to set in the OkHttp client.
+     *
+     * @param interceptor to set for OkHttp
+     * @return this builder for chaining options together
+     */
+    public abstract Builder networkInterceptor(Interceptor interceptor);
+
     abstract MapboxSpeech autoBuild();
 
     /**