[Conversation Notification] Use fallback drawable loading

Size restricted drawable loading can fail. So we need to fallback loading fullsize as it is done in CachingIconView.

Fixes: 330554718
Bug: 305540309
Test: Presubmit + send Messaging Notifications and observe Images are loaded.
Flag: ACONFIG android.widget.flags.conversation_style_set_avatar_async TEAMFOOD
Change-Id: I5fa66d42923d4365803cda884a1b96c1e1c9f84d
1 file changed