[SB][Chips] Don't add text composable if text is empty.

The Text composable has end padding which will make the icon look
off-center if the text is empty.

Also improves the logging of the chip models.

Fixes: 407526550
Test: Trigger RON chip with empty shortCriticalText -> verify icon isn't
off-center
Flag: android.app.ui_rich_ongoing

Change-Id: Ie5a03d7b264e3f7c7dff2f861b1b6fb0dc1ac0c3