private void getAllContacts(final Promise promise) {
        getExecutor().execute(() -> {
            Context context = getReactApplicationContext();
            ContentResolver cr = context.getContentResolver();
            ContactsProvider contactsProvider = new ContactsProvider(cr);
            WritableArray contacts = contactsProvider.getContacts();
            promise.resolve(contacts);
        });
    }
Retrieves contacts.
Uses raw URI when <code>rawUri</code> is <code>true</code>, makes assets copy
otherwise.
android/src/main/java/com/rt2zz/reactnativecontacts/impl/ContactsManagerImpl.java