Add quick access wallet tile.

This tile is gated by a feature flag and the QAW Client service availability.
Also add a new icon for the wallet tile as a fallback option - if it fails fetching the icon from QAW Client, the fallback icon will be used.

Bug: 180959290
Test: atest

Change-Id: I56bdbef5b4d5d41abacb598422d8a2a4716a79fd