shadows/framework/src/main/java/org/robolectric/shadows/ShadowCrossProfileApps.java
@Implementation
  protected Drawable getProfileSwitchingIconDrawable(UserHandle userHandle) {
    verifyCanAccessUser(userHandle);
    return new ColorDrawable(userHandle.getIdentifier());
  }
@Implementation
  protected Drawable getProfileSwitchingIconDrawable(UserHandle userHandle) {
    verifyCanAccessUser(userHandle);
    return new ColorDrawable(userHandle.getIdentifier());
  }
Returns a {@link Drawable} that can be shown for profile switching, which is guaranteed to
always be the same for a particular user and to be distinct between users.