[AOD RONs] Add support for different scale large icons

Fix: 406779921
Test: manually tested a bunch of cases: with and without large icon,
with long title, with long text, with long subtext, with different
aspect ratios
Flag: android.app.ui_rich_ongoing

Change-Id: I8b53553a0c9fcc3065b106e5ef1c8b420f9e7c42