Resolve some lint and build warnings

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/java/com/wireguard/android/fragment/ConfigNamingDialogFragment.java

@@ -77,7 +77,7 @@ public class ConfigNamingDialogFragment extends DialogFragment {
 
     @Override
     public Dialog onCreateDialog(final Bundle savedInstanceState) {
-        final Activity activity = Objects.requireNonNull(getActivity());
+        final Activity activity = requireActivity();
 
         imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
 

app/src/main/res/values-zh-rCN/strings.xml

@@ -139,7 +139,7 @@
     <string name="tools_installer_working">正在安装 wg 与 wg-quick...</string>
     <string name="tools_unavailable_error">所需工具不可用</string>
     <string name="transfer">流量</string>
-    <string name="transfer_rx_tx">接收：%s，发送：%s</string>
+    <string name="transfer_rx_tx">接收：%1$s，发送：%2$s</string>
     <string name="transfer_bytes">%d B</string>
     <string name="transfer_kibibytes">%.2f KiB</string>
     <string name="transfer_mibibytes">%.2f MiB</string>