build: update OkHttp to 5.3.0 stable (#9)

* build: update OkHttp 5.0.0-alpha.3 to 5.3.0 stable

Move off the pre-release alpha to the current stable OkHttp 5.x line.
5.3.0 is the latest stable whose okhttp-android artifact still supports
compileSdk 35 (5.4.0 requires minCompileSdk=36). The network-client API used
(OkHttpClient, newCall/execute, Request.Builder, Credentials.basic,
toMediaType/toRequestBody, HttpUrl) is stable across 5.x; no source changes.

* refactor: replace okhttp3.internal.closeQuietly with local extension

okhttp3.internal.closeQuietly is an unstable internal API. Replace it with a
small private Closeable.closeQuietly() extension (same semantics) so the
OkHttp upgrade path stays robust.

Author: hawkff

app/build.gradle.kts

@@ -65,7 +65,7 @@ dependencies {
     implementation("com.blacksquircle.ui:language-base:2.6.0")
     implementation("com.blacksquircle.ui:language-json:2.6.0")
 
-    implementation("com.squareup.okhttp3:okhttp:5.0.0-alpha.3")
+    implementation("com.squareup.okhttp3:okhttp:5.3.0")
     implementation("org.yaml:snakeyaml:2.3")
     implementation("com.github.daniel-stoneuk:material-about-library:3.2.0-rc01")
     implementation("com.jakewharton:process-phoenix:2.1.2")

app/src/main/java/io/nekohasekai/sagernet/ui/ConfigurationFragment.kt

@@ -116,7 +116,7 @@ import moe.matsuri.nb4a.proxy.anytls.AnyTLSSettingsActivity
 import moe.matsuri.nb4a.proxy.config.ConfigSettingActivity
 import moe.matsuri.nb4a.proxy.shadowtls.ShadowTLSSettingsActivity
 import moe.matsuri.nb4a.ui.ConnectionTestNotification
-import okhttp3.internal.closeQuietly
+import java.io.Closeable
 import java.net.InetSocketAddress
 import java.net.Socket
 import java.net.UnknownHostException
@@ -2052,3 +2052,14 @@ class ConfigurationFragment @JvmOverloads constructor(
     }
 
 }
+
+/**
+ * Closes this resource, ignoring any exception. Replacement for OkHttp's internal
+ * `closeQuietly()` extension so we don't depend on an unstable `okhttp3.internal` API.
+ */
+private fun Closeable.closeQuietly() {
+    try {
+        close()
+    } catch (_: Exception) {
+    }
+}