[expo-cli][eject] Fix generated orientation in AndroidManifest

packages/config/src/android/Orientation.ts

@@ -16,7 +16,8 @@ export async function setAndroidOrientation(config: ExpoConfig, manifestDocument
   const mainActivity = manifestDocument.manifest.application[0].activity.filter(
     (e: any) => e['$']['android:name'] === '.MainActivity'
   );
-  mainActivity[0]['$'][SCREEN_ORIENTATION_ATTRIBUTE] = orientation;
+  mainActivity[0]['$'][SCREEN_ORIENTATION_ATTRIBUTE] =
+    orientation !== 'default' ? orientation : 'unspecified';
 
   return manifestDocument;
 }

packages/config/src/android/__tests__/Orientation-test.js

@@ -42,5 +42,18 @@ describe('Android orientation', () => {
       );
       expect(mainActivity[0]['$']['android:screenOrientation']).toMatch('portrait');
     });
+
+    it('replaces orientation with unspecified if provided default', async () => {
+      androidManifestJson = await readAndroidManifestAsync(sampleManifestPath);
+      androidManifestJson = await setAndroidOrientation(
+        { orientation: 'default' },
+        androidManifestJson
+      );
+
+      const mainActivity = androidManifestJson.manifest.application[0].activity.filter(
+        e => e['$']['android:name'] === '.MainActivity'
+      );
+      expect(mainActivity[0]['$']['android:screenOrientation']).toMatch('unspecified');
+    });
   });
 });