fix: App crash when app name contains contain non-ASCII characters (#562

)

- We include the application name in the User-Agent request header to
identify the app usage. If the app name includes special characters, it
leads to a crash because the header value should not contain non-ASCII
values. square/okhttp#891
- In this commit, we have passed the package name to the User-Agent
instead of the App name because the package name is also unique.

core/src/main/java/in/testpress/util/UserAgentProvider.java

@@ -15,7 +15,7 @@
  *
  * Example
  *
- * testpress/1.1.2 (Dalvik; Android 9; Xiaomi POCO F1 Build/PKQ1.180729.001) okhttp
+ * in.testpress.samples/1.1.2 (Dalvik; Android 9; Xiaomi POCO F1 Build/PKQ1.180729.001) okhttp
  *
  */
 public class UserAgentProvider {
@@ -34,7 +34,7 @@ public static String get(Context context) {
                         e.printStackTrace();
                     }
                     userAgent = String.format("%s/%s (Dalvik; Android %s; %s %s Build/%s) okhttp",
-                            context.getApplicationInfo().loadLabel(context.getPackageManager()),
+                            context.getApplicationInfo().packageName,
                             appVersion,
                             Build.VERSION.RELEASE,
                             Build.MANUFACTURER,