Redact some content of AOD RON notifs in logs

This replaces some of the more egregiously revealing pieces of content
(title, text, image URLs as best I could, etc.) in
PromotedNotificationContentModel with redacted versions in the
PromotedNotificationLog, so we aren't literally sticking chat messages
in bugreports.

Bug: 402929218
Flag: com.android.systemui.aod_ui_rich_ongoing
Test: manual
Change-Id: I435f4bc4df668e1e223dd8ee0563160592ed0ef7