fix(accessibility): Add content description for QR code dialog / [无障碍] 修复二维码弹窗缺失内容描述的问题 (#5110)

* 在显示 Dialog 之前，从资源数组中获取第一个元素（即“二维码”），并设置为图片的 contentDescription。

* Update V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainRecyclerAdapter.kt

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: 2dust <31833384+2dust@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainRecyclerAdapter.kt

@@ -201,6 +201,11 @@ class MainRecyclerAdapter(val activity: MainActivity) : RecyclerView.Adapter<Mai
     private fun showQRCode(guid: String) {
         val ivBinding = ItemQrcodeBinding.inflate(LayoutInflater.from(mActivity))
         ivBinding.ivQcode.setImageBitmap(AngConfigManager.share2QRCode(guid))
+        if (share_method.isNotEmpty()) {
+            ivBinding.ivQcode.contentDescription = share_method[0]
+        } else {
+            ivBinding.ivQcode.contentDescription = "QR Code"
+        }
         AlertDialog.Builder(mActivity).setView(ivBinding.root).show()
     }