@Nullable
    public String getUri() {
        return mUri;
    }
Returns the raw URI for this {@link Person} or {@code null} if no URI was provided. A URI can
be any of the following:
<ul>
<li>The {@code String} representation of a
{@link android.provider.ContactsContract.Contacts#CONTENT_LOOKUP_URI}</li>
<li>A {@code mailto:} schema*</li>
<li>A {@code tel:} schema*</li>
</ul>

<p>*Note for these schemas, the path portion of the URI must exist in the contacts
database in their appropriate column, otherwise the reference should be discarded.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/compat/Person.java