Enable SPI for Http modules (#602)

sdk/core/azure-core-http-httpurlconnection/src/main/java/com/azure/android/core/http/httpurlconnection/HttpUrlConnectionAsyncHttpClientProvider.java

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package com.azure.android.core.http.httpurlconnection;
+
+import com.azure.android.core.http.HttpClient;
+import com.azure.android.core.http.HttpClientProvider;
+
+/**
+ * An {@link HttpClientProvider} that provides an implementation of HttpClient based on HttpUrlConnection.
+ */
+public class HttpUrlConnectionAsyncHttpClientProvider implements HttpClientProvider {
+    @Override
+    public HttpClient createInstance() {
+        return new HttpUrlConnectionAsyncHttpClientBuilder().build();
+    }
+}

sdk/core/azure-core-http-httpurlconnection/src/main/resources/META-INF/services/com.azure.core.http.HttpClientProvider

@@ -1 +1 @@
-com.azure.core.http.okhttp.implementation.OkHttpClientProvider
+com.azure.android.core.http.httpurlconnection.HttpUrlConnectionAsyncHttpClientProvider

sdk/core/azure-core-http-okhttp/src/main/java/com/azure/android/core/http/okhttp/OkHttpAsyncClientProvider.java

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package com.azure.android.core.http.okhttp;
+
+import com.azure.android.core.http.HttpClient;
+import com.azure.android.core.http.HttpClientProvider;
+
+/**
+ * An {@link HttpClientProvider} that provides an implementation of HttpClient based on OkHttp.
+ */
+public final class OkHttpAsyncClientProvider implements HttpClientProvider {
+    @Override
+    public HttpClient createInstance() {
+        return new OkHttpAsyncHttpClientBuilder().build();
+    }
+}

sdk/core/azure-core-http-okhttp/src/main/resources/META-INF/services/com.azure.core.http.HttpClientProvider

@@ -1 +1 @@
-com.azure.core.http.okhttp.implementation.OkHttpClientProvider
+com.azure.android.core.http.okhttp.OkHttpAsyncClientProvider