feat(request-timeout): set proper timeout for HTTP requests

set connect timeout to 5s
set read and write timeout to 5s
set call timeout to 10s
for image-downloading requests, set call timeout to 0 (no timeout)

app/src/main/java/com/hippo/ehviewer/EhApplication.java

@@ -132,9 +132,10 @@ public class EhApplication extends RecordingApplication {
         EhApplication application = ((EhApplication) context.getApplicationContext());
         if (application.mOkHttpClient == null) {
             application.mOkHttpClient = new OkHttpClient.Builder()
-                    .connectTimeout(10, TimeUnit.SECONDS)
-                    .readTimeout(10, TimeUnit.SECONDS)
-                    .writeTimeout(10, TimeUnit.SECONDS)
+                    .connectTimeout(5, TimeUnit.SECONDS)
+                    .readTimeout(5, TimeUnit.SECONDS)
+                    .writeTimeout(5, TimeUnit.SECONDS)
+                    .callTimeout(10, TimeUnit.SECONDS)
                     .cookieJar(getEhCookieStore(application))
                     .dns(new EhDns(application))
                     .proxySelector(getEhProxySelector(application))