ShadowInputManager.getInputDeviceIds() will now return results that c…

…orroborate the return values of .getInputDevices().

Before this commit, ShadowInputManager.getInputDeviceIds() would only ever return an empty array even if there were InputDevices present. This change uses the result of ShadowInputManager.getInputDevices() to return an int array of all IDs present for a more realistic result

PiperOrigin-RevId: 589979183

shadows/framework/src/main/java/org/robolectric/shadows/ShadowInputManager.java

@@ -44,7 +44,21 @@ protected boolean[] deviceHasKeys(int id, int[] keyCodes) {
   /** Used in {@link InputDevice#getDeviceIds()} */
   @Implementation
   protected int[] getInputDeviceIds() {
-    return new int[0];
+    if (!ReflectionHelpers.hasField(InputManager.class, "mInputDevices")) {
+      return new int[0];
+    }
+
+    SparseArray<InputDevice> inputDevices = getInputDevices();
+    if (inputDevices == null) {
+      return new int[0];
+    }
+
+    int[] ids = new int[inputDevices.size()];
+    for (int i = 0; i < inputDevices.size(); i++) {
+      ids[i] = inputDevices.get(i).getId();
+    }
+
+    return ids;
   }
 
   @Implementation(maxSdk = TIRAMISU)