Subtle improvements to notification logging.

* NotificationLog buffer is now 10x the size when dev-logging flag is enabled.
* NotifCollection now passes a reason to buildList, which gets logged.
* ShadeListBuilder (when dev-logging flag is enabled) now logs the rank of every notification in the list.

All of these changes are targeted at better understanding whether the incorrect order of children in some situations is due to unexpected changes in the ranking provided to the ShadeListBuilder, or due to incorrect logic in that class.

Bug: 237216329
Test: atest SystemUITests
Test: dumpsysui NotifLog ShadeListBuilder
Change-Id: I45be2cc3af4114fa4285491e8fd961c0fd548f3c