Create/rename methods to track entryadapter usage

Create a new getEntryLegacy() method that throws if used
with the bundling flag on, and use that in every place that has already
been migrated

Deprecate both getEntry() and getEntryLegacy() so new usages stop appearing

Do the same for setEntry()

Test: full SystemUI suite
Test: boot device and post notification with flag on and off
Bug: 395857098
Flag: com.android.systemui.notification_bundle_ui

Change-Id: Ib4431652e869c83b4a2f32cde8e2230c9d4a6e71