Address PR review feedback

Author: ChiragAgg5k

templates/android/library/src/main/java/io/package/Client.kt.twig

@@ -239,7 +239,7 @@ class Client @JvmOverloads constructor(
      *
      * @return the OkHttpClient instance used by this client
      */
-    fun getHttpClient(): OkHttpClient = http.newBuilder().build()
+    fun getHttpClient(): OkHttpClient = http
 
     /**
      * Sends a "ping" request to Appwrite to verify connectivity.

templates/rust/src/client.rs.twig

@@ -272,11 +272,16 @@ impl Client {
             .config
             .headers
             .iter()
-            .filter_map(|(key, value)| {
-                value
-                    .to_str()
-                    .ok()
-                    .map(|value| (key.as_str().to_string(), value.to_string()))
+            .filter_map(|(key, value)| match value.to_str() {
+                Ok(value) => Some((key.as_str().to_string(), value.to_string())),
+                Err(_) => {
+                    debug_assert!(
+                        false,
+                        "Non-UTF-8 header value found for key {}",
+                        key.as_str()
+                    );
+                    None
+                }
             })
             .collect()
     }

tests/languages/apple/Tests.swift

@@ -25,7 +25,7 @@ class Tests: XCTestCase {
             .addHeader(key: "Origin", value: "http://localhost")
             .setSelfSigned()
         let sdkHeaders = client.getHeaders()
-        print("x-sdk-name: \(sdkHeaders["x-sdk-name"]!); x-sdk-platform: \(sdkHeaders["x-sdk-platform"]!); x-sdk-language: \(sdkHeaders["x-sdk-language"]!); x-sdk-version: \(sdkHeaders["x-sdk-version"]!)")
+        print("x-sdk-name: \(sdkHeaders["x-sdk-name"] ?? "nil"); x-sdk-platform: \(sdkHeaders["x-sdk-platform"] ?? "nil"); x-sdk-language: \(sdkHeaders["x-sdk-language"] ?? "nil"); x-sdk-version: \(sdkHeaders["x-sdk-version"] ?? "nil")")
 
         // Ping pong test
         let ping = try await client.ping()

tests/languages/swift/Tests.swift

@@ -25,7 +25,7 @@ class Tests: XCTestCase {
             .addHeader(key: "Origin", value: "http://localhost")
             .setSelfSigned()
         let sdkHeaders = client.getHeaders()
-        print("x-sdk-name: \(sdkHeaders["x-sdk-name"]!); x-sdk-platform: \(sdkHeaders["x-sdk-platform"]!); x-sdk-language: \(sdkHeaders["x-sdk-language"]!); x-sdk-version: \(sdkHeaders["x-sdk-version"]!)")
+        print("x-sdk-name: \(sdkHeaders["x-sdk-name"] ?? "nil"); x-sdk-platform: \(sdkHeaders["x-sdk-platform"] ?? "nil"); x-sdk-language: \(sdkHeaders["x-sdk-language"] ?? "nil"); x-sdk-version: \(sdkHeaders["x-sdk-version"] ?? "nil")")
 
         // Ping pong test
         let ping = try await client.ping()