Short circuit get sign key ID

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -1574,10 +1574,17 @@ public class FragmentCompose extends FragmentBase {
                 }
 
                 // Call OpenPGP
-                Log.i("Executing " + data.getAction());
-                Log.logExtras(data);
-                OpenPgpApi api = new OpenPgpApi(context, pgpService.getService());
-                Intent result = api.executeApi(data, new FileInputStream(input), new FileOutputStream(output));
+                Intent result;
+                if (OpenPgpApi.ACTION_GET_SIGN_KEY_ID.equals(data.getAction()) && identity.sign_key != null) {
+                    result = data;
+                    result.putExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_SUCCESS);
+                    result.putExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, identity.sign_key);
+                } else {
+                    Log.i("Executing " + data.getAction());
+                    Log.logExtras(data);
+                    OpenPgpApi api = new OpenPgpApi(context, pgpService.getService());
+                    result = api.executeApi(data, new FileInputStream(input), new FileOutputStream(output));
+                }
 
                 // Process result
                 try {