Element Enterprise: use different appId for nightly build.

app/build.gradle.kts

@@ -156,7 +156,11 @@ android {
                 groups = "external-testers"
                 // This should not be required, but if I do not add the appId, I get this error:
                 // "App Distribution halted because it had a problem uploading the APK: [404] Requested entity was not found."
-                appId = "1:912726360885:android:e17435e0beb0303000427c"
+                appId = if (isEnterpriseBuild) {
+                    "1:912726360885:android:3f7e1fe644d99d5a00427c"
+                } else {
+                    "1:912726360885:android:e17435e0beb0303000427c"
+                }
             }
         }
     }